{"id":2498,"date":"2024-07-02T17:41:31","date_gmt":"2024-07-02T14:41:31","guid":{"rendered":"https:\/\/innfes.com\/vi\/how-to-calculate-the-rafters-for-the-roof\/"},"modified":"2024-07-02T17:41:31","modified_gmt":"2024-07-02T14:41:31","slug":"how-to-calculate-the-rafters-for-the-roof","status":"publish","type":"post","link":"https:\/\/innfes.com\/vi\/how-to-calculate-the-rafters-for-the-roof\/","title":{"rendered":"C\u00e1ch t\u00ednh to\u00e1n b\u00e8 cho m\u00e1i nh\u00e0: X\u00e1c \u0111\u1ecbnh \u0111\u1ed9 d\u00e0i, ph\u1ea7n ch\u00e9o v\u00e0 t\u1ea3i tr\u00ean b\u00e8"},"content":{"rendered":"\n<p>X\u00e1c \u0111\u1ecbnh b\u00e8 l\u00e0 m\u1ed9t b\u01b0\u1edbc quan tr\u1ecdng trong x\u00e2y d\u1ef1ng m\u00e1i nh\u00e0. C\u1ea5u tr\u00fac m\u00e1i nh\u00e0 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 b\u1edfi d\u1ea7m Rafter, l\u00e0 nh\u1eefng ch\u00f9m g\u00f3c h\u01b0\u1edbng chuy\u1ec3n tr\u1ecdng l\u01b0\u1ee3ng sang c\u00e1c b\u1ee9c t\u01b0\u1eddng. \u0110\u1ec3 m\u00e1i nh\u00e0 \u1ed5n \u0111\u1ecbnh v\u00e0 k\u00e9o d\u00e0i, chi\u1ec1u d\u00e0i, m\u1eb7t c\u1eaft v\u00e0 t\u1ea3i tr\u00ean b\u00e8 ph\u1ea3i \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh.<\/p>\n<p>Cao \u0111\u1ed9 c\u1ee7a m\u00e1i nh\u00e0 v\u00e0 kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c b\u1ee9c t\u01b0\u1eddng h\u1ed7 tr\u1ee3 l\u00e0 hai bi\u1ebfn ch\u00ednh x\u00e1c \u0111\u1ecbnh chi\u1ec1u d\u00e0i c\u1ee7a b\u00e8. G\u00f3c c\u1ee7a \u0111\u1ed9 d\u1ed1c m\u00e1i, ho\u1eb7c s\u00e2n, x\u00e1c \u0111\u1ecbnh m\u1ee9c \u0111\u1ed9 m\u1ea1nh c\u1ee7a b\u00e8 s\u1ebd nghi\u00eang. C\u1ea7n s\u1eed. Kho\u1ea3ng c\u00e1ch ngang y\u00eau c\u1ea7u c\u1ee7a b\u00e8 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c b\u1ee9c t\u01b0\u1eddng. X\u00e2y d\u1ef1ng c\u00e1c chuy\u00ean gia c\u00f3 th\u1ec3 c\u1eaft b\u00e8 ch\u00ednh x\u00e1c \u0111\u1ebfn chi\u1ec1u d\u00e0i c\u1ea7n thi\u1ebft cho s\u1ef1 ph\u00f9 h\u1ee3p v\u1edbi s\u1ef1 ph\u00f9 h\u1ee3p b\u1eb1ng c\u00e1ch \u0111o ch\u00ednh x\u00e1c c\u00e1c k\u00edch th\u01b0\u1edbc n\u00e0y.<\/p>\n<p>Thu\u1eadt ng\u1eef &quot;c\u1eaft ngang&quot; m\u00f4 t\u1ea3 c\u00e1c k\u00edch th\u01b0\u1edbc v\u00e0 h\u00ecnh th\u1ee9c th\u1ef1c t\u1ebf c\u1ee7a rafter. Ph\u1ea7n l\u1edbn c\u00e1c b\u00e8 c\u00f3 m\u1eb7t c\u1eaft h\u00ecnh tam gi\u00e1c, v\u1edbi \u0111\u1ec9nh l\u00e0 ph\u1ea7n h\u1eb9p nh\u1ea5t v\u00e0 l\u01b0\u1ee1i, c\u01a1 s\u1edf d\u00e0y h\u01a1n. \u0110i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng, m\u00e3 x\u00e2y d\u1ef1ng \u0111\u1ecba ph\u01b0\u01a1ng v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a m\u00e1i nh\u00e0 (b\u1ec7nh zona ho\u1eb7c g\u1ea1ch) \u0111\u1ec1u \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn k\u00edch th\u01b0\u1edbc m\u1eb7t c\u1eaft ngang v\u00e0 k\u00edch th\u01b0\u1edbc. C\u00e1c v\u1eadt li\u1ec7u x\u00e2y d\u1ef1ng nh\u01b0 th\u00e9p, g\u1ed7 ho\u1eb7c g\u1ed7 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ch\u1ecdn m\u1ed9t m\u1eb7t c\u1eaft s\u1ebd kh\u00f4ng kh\u00f3a ho\u1eb7c ch\u00f9ng xu\u1ed1ng d\u01b0\u1edbi t\u1ea3i d\u1ef1 \u0111o\u00e1n.<\/p>\n<p>Tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a c\u1ea5u tr\u00fac m\u00e1i, bao g\u1ed3m c\u1ea3 l\u1edbp ph\u1ee7, c\u00e1ch nhi\u1ec7t v\u00e0 b\u1ea5t k\u1ef3 t\u1ea3i tr\u1ecdng b\u1ed5 sung n\u00e0o nh\u01b0 tuy\u1ebft ho\u1eb7c gi\u00f3, ph\u1ea3i \u0111\u01b0\u1ee3c t\u00ednh \u0111\u1ebfn khi t\u00ednh to\u00e1n t\u1ea3i tr\u00ean b\u00e8. T\u00ednh to\u00e1n n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng theo th\u1eddi gian, b\u00e8 c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 m\u1ed9t c\u00e1ch an to\u00e0n t\u1ea5t c\u1ea3 c\u00e1c tr\u1ecdng s\u1ed1 n\u00e0y. T\u1ed5ng t\u1ea3i m\u00e0 c\u00e1c b\u00e8 ph\u1ea3i ch\u1ecbu ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1, bao g\u1ed3m c\u1ea3 v\u1ecb tr\u00ed (c\u00e1c v\u00f9ng kh\u00e1c nhau c\u00f3 c\u00e1c y\u00eau c\u1ea7u kh\u00e1c nhau \u0111\u1ed1i v\u1edbi t\u1ea3i tr\u1ecdng tuy\u1ebft), h\u00ecnh d\u1ea1ng m\u00e1i v\u00e0 h\u01b0\u1edbng m\u00e1i (\u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u1ea3i tr\u1ecdng gi\u00f3).<\/p>\n<blockquote><p>\n   Bi\u1ebft c\u00e1ch t\u00ednh to\u00e1n b\u00e8 khi x\u00e2y d\u1ef1ng m\u1ed9t m\u00e1i nh\u00e0 l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o c\u1ea3 t\u00ednh to\u00e0n v\u1eb9n v\u00e0 an to\u00e0n v\u1ec1 c\u1ea5u tr\u00fac. \u0110i\u1ec1u n\u00e0y \u0111\u00f2i h\u1ecfi ph\u1ea3i t\u00ecm ra chi\u1ec1u d\u00e0i v\u00e0 m\u1eb7t c\u1eaft th\u00edch h\u1ee3p c\u1ee7a b\u00e8 c\u0169ng nh\u01b0 \u01b0\u1edbc t\u00ednh tr\u1ecdng l\u01b0\u1ee3ng m\u00e0 h\u1ecd s\u1ebd h\u1ed7 tr\u1ee3. \u0110\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 th\u00e0nh th\u1ea1o trong c\u00e1c t\u00ednh to\u00e1n n\u00e0y cho ph\u00e9p c\u00e1c nh\u00e0 x\u00e2y d\u1ef1ng t\u1ea1o ra c\u00e1c m\u00e1i nh\u00e0 m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u \u0111\u1ed9c \u0111\u00e1o c\u1ee7a c\u1ea5u tr\u00fac, c\u00f3 th\u1ec3 l\u00e0 khu d\u00e2n c\u01b0, th\u01b0\u01a1ng m\u1ea1i ho\u1eb7c c\u00f4ng nghi\u1ec7p, \u0111\u1ed3ng th\u1eddi ch\u1ecbu \u0111\u1ef1ng nh\u1eefng \u1ea3nh h\u01b0\u1edfng b\u00ean ngo\u00e0i.&quot;\n  <\/p><\/blockquote>\n<h2>C\u00e1c chi ti\u1ebft c\u1ee5 th\u1ec3 c\u1ee7a vi\u1ec7c t\u00ednh to\u00e1n khung Rafter<\/h2>\n<p>M\u00e1i nh\u00e0, ph\u1ee5c v\u1ee5 m\u1ed9t s\u1ed1 m\u1ee5c \u0111\u00edch quan tr\u1ecdng, \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh v\u00e0 c\u00f3 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m s\u1ee9c m\u1ea1nh \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi h\u1ec7 th\u1ed1ng Rafter. \u0110\u00e2y l\u00e0 m\u1ed9t ph\u1ea7n thi\u1ebft y\u1ebfu c\u1ee7a b\u1ed9 \u0111\u1ed3ng ph\u1ee5c ki\u1ebfn \u200b\u200btr\u00fac v\u00e0 m\u1ed9t thi\u1ebft k\u1ebf k\u00e8m theo c\u00f3 tr\u00e1ch nhi\u1ec7m. K\u1ebft qu\u1ea3 l\u00e0, c\u00e1c t\u00ednh to\u00e1n v\u00e0 thi\u1ebft k\u1ebf c\u1ee7a ch\u00e2n rafter n\u00ean c\u1ed1 g\u1eafng lo\u1ea1i b\u1ecf l\u1ed7i v\u00e0 sai s\u00f3t.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\"  src=\"\/wp-content\/uploads\/2024\/07\/kak-rasschitat-stropila-dlja-kryshi-opredelenie_1.jpg\"><\/p>\n<p>Th\u00f4ng th\u01b0\u1eddng, c\u00e1c ph\u00e1t tri\u1ec3n thi\u1ebft k\u1ebf c\u00f3 t\u00ednh \u0111\u1ebfn nhi\u1ec1u t\u00f9y ch\u1ecdn v\u00e0 ch\u1ecdn l\u1ef1a ch\u1ecdn t\u1ed1t nh\u1ea5t. Ch\u1ecdn t\u00f9y ch\u1ecdn t\u1ed1t nh\u1ea5t kh\u00f4ng y\u00eau c\u1ea7u b\u1ea1n t\u1ea1o m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng d\u1ef1 \u00e1n c\u1ee5 th\u1ec3, th\u1ef1c hi\u1ec7n c\u00e1c t\u00ednh to\u00e1n ch\u00ednh x\u00e1c cho t\u1eebng d\u1ef1 \u00e1n, v\u00e0 sau \u0111\u00f3 \u1ee7ng h\u1ed9 m\u1ed9t v\u00e0 duy nh\u1ea5t.<\/p>\n<p>S\u1ef1 l\u1ef1a ch\u1ecdn t\u1ec9 m\u1ec9 c\u1ee7a h\u00ecnh th\u1ee9c thi\u1ebft k\u1ebf v\u00e0 k\u00edch th\u01b0\u1edbc c\u1ee7a v\u1eadt li\u1ec7u \u0111\u1ec3 x\u00e2y d\u1ef1ng l\u00e0 qu\u00e1 tr\u00ecnh x\u00e1c \u0111\u1ecbnh chi\u1ec1u d\u00e0i, \u0111\u1ed9 d\u1ed1c l\u1eafp v\u00e0 m\u1eb7t c\u1eaft ngang c\u1ee7a rafter.<\/p>\n<p>Ch\u1eb3ng h\u1ea1n, c\u00e1c th\u00f4ng s\u1ed1 m\u1eb7t c\u1eaft ngang c\u1ee7a v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p nh\u1ea5t v\u1edbi gi\u00e1 c\u1ee7a v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o \u0111\u1ea7u ti\u00ean trong c\u00f4ng th\u1ee9c \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c c\u1ee7a ch\u00e2n Rafter. Ngo\u00e0i ra, k\u00edch th\u01b0\u1edbc c\u1ee7a g\u1ed7 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh cho \u0111\u1ebfn khi n\u00f3 \u0111\u1ea1t \u0111\u1ebfn m\u1ee9c \u0111\u1ed9 ph\u00f9 h\u1ee3p cao nh\u1ea5t n\u1ebfu k\u1ebft qu\u1ea3 kh\u00f4ng \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\"  src=\"\/wp-content\/uploads\/2024\/07\/kak-rasschitat-stropila-dlja-kryshi-opredelenie_3.jpg\"><\/p>\n<h3>Ph\u01b0\u01a1ng ph\u00e1p t\u00ecm ki\u1ebfm g\u00f3c nghi\u00eang<\/h3>\n<p>C\u00f3 nh\u1eefng y\u1ebfu t\u1ed1 k\u1ef9 thu\u1eadt v\u00e0 ki\u1ebfn \u200b\u200btr\u00fac c\u1ea7n xem x\u00e9t khi x\u00e1c \u0111\u1ecbnh g\u00f3c \u0111\u1ed9 d\u1ed1c c\u1ee7a c\u1ea5u tr\u00fac cao \u0111i\u1ec3m. Ngo\u00e0i m\u1ed9t s\u1ef1 s\u1eafp x\u1ebfp c\u00e2n \u0111\u1ed1i ph\u00f9 h\u1ee3p v\u1edbi phong c\u00e1ch c\u1ee7a t\u00f2a nh\u00e0, m\u1ed9t gi\u1ea3i ph\u00e1p l\u00fd t\u01b0\u1edfng n\u00ean xem x\u00e9t:<\/p>\n<ul>\n<li><strong>Ch\u1ec9 s\u1ed1 t\u1ea3i tuy\u1ebft.<\/strong> \u1ede nh\u1eefng khu v\u1ef1c c\u00f3 l\u01b0\u1ee3ng m\u01b0a phong ph\u00fa, m\u00e1i nh\u00e0 \u0111\u01b0\u1ee3c d\u1ef1ng l\u00ean v\u1edbi \u0111\u1ed9 d\u1ed1c t\u1eeb 45 \u0111\u1ed9 tr\u1edf l\u00ean. Ti\u1ec1n g\u1eedi tuy\u1ebft kh\u00f4ng b\u1ecb tr\u00ec ho\u00e3n tr\u00ean c\u00e1c s\u01b0\u1eddn d\u1ed1c nh\u01b0 v\u1eady, do \u0111\u00f3 t\u1ed5ng t\u1ea3i tr\u00ean m\u00e1i nh\u00e0, ch\u1eb7n g\u1ed7 v\u00e0 c\u1ea5u tr\u00fac n\u00f3i chung \u0111\u01b0\u1ee3c gi\u1ea3m \u0111\u00e1ng k\u1ec3.<\/li>\n<li><strong>C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a t\u1ea3i gi\u00f3.<\/strong> \u1ede nh\u1eefng khu v\u1ef1c c\u00f3 gi\u00f3 m\u1ea1nh, v\u00f9ng ven bi\u1ec3n, th\u1ea3o nguy\u00ean v\u00e0 mi\u1ec1n n\u00fai, ch\u00fang x\u00e2y d\u1ef1ng c\u00e1c c\u1ea5u tr\u00fac ph\u00e2n t\u00e1n th\u1ea5p c\u1ee7a h\u00ecnh d\u1ea1ng \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp h\u1ee3p l\u00fd. \u0110\u1ed9 d\u1ed1c c\u1ee7a \u0111\u1ed9 d\u1ed1c \u1edf \u0111\u00f3 th\u01b0\u1eddng kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 30 \u0111\u1ed9. Ngo\u00e0i ra, gi\u00f3 ng\u0103n ch\u1eb7n s\u1ef1 h\u00ecnh th\u00e0nh c\u00e1c m\u1ecf tuy\u1ebft tr\u00ean m\u00e1i nh\u00e0.<\/li>\n<li><strong>Kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 lo\u1ea1i l\u1ee3p.<\/strong> Tr\u1ecdng l\u01b0\u1ee3ng v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 c\u1ee7a m\u00e1i nh\u00e0 c\u00e0ng l\u1edbn, b\u1ea1n c\u1ea7n x\u00e2y d\u1ef1ng khung Rafter c\u00e0ng l\u1edbn. V\u00ec v\u1eady, c\u1ea7n ph\u1ea3i gi\u1ea3m kh\u1ea3 n\u0103ng r\u00f2 r\u1ec9 qua c\u00e1c kh\u1edbp v\u00e0 gi\u1ea3m tr\u1ecdng l\u01b0\u1ee3ng ri\u00eang c\u1ee7a l\u1edbp ph\u1ee7, tr\u00ean m\u1ed7i \u0111\u01a1n v\u1ecb h\u00ecnh chi\u1ebfu ngang c\u1ee7a m\u00e1i nh\u00e0.<\/li>\n<\/ul>\n<p>T\u1ea5t c\u1ea3 c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111\u00e3 n\u00f3i \u1edf tr\u00ean ph\u1ea3i \u0111\u01b0\u1ee3c xem x\u00e9t \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh g\u00f3c \u0111\u1ed9 nghi\u00eang l\u00fd t\u01b0\u1edfng. \u0110\u1ed9 d\u1ed1c c\u1ee7a m\u00e1i nh\u00e0 t\u01b0\u01a1ng lai ph\u1ea3i tu\u00e2n th\u1ee7 c\u1ea3 c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a l\u1ee3p v\u00e0 kh\u00ed h\u1eadu c\u1ee7a t\u1ea5m l\u1ee3p \u0111\u01b0\u1ee3c ch\u1ecdn cho c\u00f4ng tr\u00ecnh c\u1ee7a khu v\u1ef1c.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\"  src=\"\/wp-content\/uploads\/2024\/07\/kak-rasschitat-stropila-dlja-kryshi-opredelenie_2.jpg\"><\/p>\n<p>\u0110\u00fang l\u00e0 ch\u1ee7 s\u1edf h\u1eefu t\u00e0i s\u1ea3n \u1edf c\u00e1c khu v\u1ef1c ph\u00eda b\u1eafc thanh b\u00ecnh n\u00ean l\u01b0u \u00fd r\u1eb1ng l\u01b0\u1ee3ng v\u1eadt li\u1ec7u ti\u00eau th\u1ee5 t\u0103ng l\u00ean khi g\u00f3c nghi\u00eang c\u1ee7a ch\u00e2n Rafter t\u0103ng l\u00ean. Chi ph\u00ed x\u00e2y d\u1ef1ng v\u00e0 s\u1eafp x\u1ebfp m\u1ed9t m\u00e1i nh\u00e0 d\u1ed1c h\u01a1n 60 \u0111\u1ebfn 65 \u0111\u1ed9 s\u1ebd v\u00e0o kho\u1ea3ng 1.Cao h\u01a1n 5 l\u1ea7n so v\u1edbi x\u00e2y d\u1ef1ng m\u1ed9t c\u1ea5u tr\u00fac \u1edf g\u00f3c 45 \u0111\u1ed9.<\/p>\n<p>Kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t \u00fd t\u01b0\u1edfng t\u1ed1t \u0111\u1ec3 h\u1ea1 th\u1ea5p \u0111\u1ed9 d\u1ed1c \u1edf nh\u1eefng n\u01a1i m\u00e0 gi\u00f3 m\u1ea1nh v\u00e0 th\u01b0\u1eddng xuy\u00ean \u0111\u1ec3 ti\u1ebft ki\u1ec7m ti\u1ec1n. M\u00e1i nh\u00e0 qu\u00e1 m\u1ee9c kh\u00f4ng h\u1ea5p d\u1eabn t\u1eeb quan \u0111i\u1ec3m ki\u1ebfn \u200b\u200btr\u00fac v\u00e0 kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng d\u1eabn \u0111\u1ebfn chi ph\u00ed th\u1ea5p h\u01a1n. Trong nh\u1eefng t\u00ecnh hu\u1ed1ng n\u00e0y, nhu c\u1ea7u v\u1ec1 c\u00e1c l\u1edbp c\u00e1ch nhi\u1ec7t th\u01b0\u1eddng l\u00e0 c\u1ea7n thi\u1ebft, \u0111i\u1ec1u n\u00e0y l\u00e0m t\u0103ng chi ph\u00ed x\u00e2y d\u1ef1ng so v\u1edbi mong \u0111\u1ee3i c\u1ee7a n\u1ec1n kinh t\u1ebf.<\/p>\n<p>\u0110\u1ed9 d\u1ed1c c\u1ee7a Rafter c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n theo \u0111\u1ed9, t\u1ef7 l\u1ec7 ph\u1ea7n tr\u0103m ho\u1eb7c \u0111\u01a1n v\u1ecb kh\u00f4ng th\u1ee9 nguy\u00ean cho th\u1ea5y chi\u1ec1u cao c\u1ee7a c\u00e0i \u0111\u1eb7t Ridge Run chia cho n\u1eeda m\u00e9t. R\u00f5 r\u00e0ng l\u00e0 \u0111\u1ed9 d\u1ed1c c\u1ee7a \u0111\u1ed9 d\u1ed1c v\u00e0 \u0111\u01b0\u1eddng tr\u1ea7n t\u1ea1o th\u00e0nh m\u1ed9t g\u00f3c \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh theo \u0111\u1ed9. B\u1edfi v\u00ec s\u1ef1 quan t\u00e2m r\u1ea5t ph\u1ee9c t\u1ea1p \u0111\u1ec3 nh\u1eadn th\u1ee9c, n\u00f3 hi\u1ebfm khi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\"  src=\"\/wp-content\/uploads\/2024\/07\/kak-rasschitat-stropila-dlja-kryshi-opredelenie_4.jpg\"><\/p>\n<p>C\u00e1c \u0111\u01a1n v\u1ecb kh\u00f4ng th\u1ee9 nguy\u00ean l\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i nh\u1ea5t b\u1edfi c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf v\u00e0 x\u00e2y d\u1ef1ng t\u00f2a nh\u00e0 th\u1ea5p. H\u1ecd th\u1ec3 hi\u1ec7n m\u1ed1i quan h\u1ec7 gi\u1eefa chi\u1ec1u cao c\u1ee7a m\u00e1i nh\u00e0 v\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a nh\u1ecbp ch\u1ed3ng l\u00ean nhau. X\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed trung t\u00e2m c\u1ee7a b\u1ee9c t\u01b0\u1eddng b\u00e0n \u0111\u1ea1p trong t\u01b0\u01a1ng lai t\u1ea1i c\u01a1 s\u1edf v\u00e0 l\u1eafp \u0111\u1eb7t \u0111\u01b0\u1eddng ray th\u1eb3ng \u0111\u1ee9ng v\u1edbi \u0111i\u1ec3m \u0111\u00e1nh d\u1ea5u chi\u1ec1u cao tr\u01b0\u1ee3t b\u0103ng l\u00e0 m\u1ed9t nhi\u1ec7m v\u1ee5 \u0111\u01a1n gi\u1ea3n h\u01a1n so v\u1edbi vi\u1ec7c c\u1eaft c\u00e1c g\u00f3c kh\u1ecfi c\u1ea1nh c\u1ee7a \u0111\u01b0\u1eddng d\u1ed1c.<\/p>\n<h3>T\u00ednh to\u00e1n chi\u1ec1u d\u00e0i c\u1ee7a ch\u00e2n rafter<\/h3>\n<p>Sau khi quy\u1ebft \u0111\u1ecbnh g\u00f3c \u0111\u1ed9 nghi\u00eang c\u1ee7a h\u1ec7 th\u1ed1ng, \u0111\u1ed9 d\u00e0i c\u1ee7a b\u00e8 \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n. Kh\u00f4ng th\u1ec3 li\u00ean k\u1ebft m\u1ed9t trong hai gi\u00e1 tr\u1ecb n\u00e0y v\u1edbi s\u1ed1 l\u01b0\u1ee3ng c\u00e1c gi\u00e1 tr\u1ecb ch\u00ednh x\u00e1c, t.\u0110\u1ebeN. \u0110\u1ed9 d\u1ed1c v\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a ch\u00e2n rafter c\u00f3 th\u1ec3 thay \u0111\u1ed5i m\u1ed9t ch\u00fat trong qu\u00e1 tr\u00ecnh t\u00ednh to\u00e1n t\u1ea3i.<\/p>\n<p>C\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c t\u00ednh to\u00e1n chi\u1ec1u d\u00e0i c\u1ee7a rafter l\u00e0 lo\u1ea1i h\u00ecnh gi\u00e1c m\u1ea1c nh\u00f4 ra<\/p>\n<ol>\n<li>M\u00e9p ngo\u00e0i c\u1ee7a ch\u00e2n rafter \u0111\u01b0\u1ee3c c\u1eaft b\u1eb1ng b\u1ec1 m\u1eb7t ngo\u00e0i c\u1ee7a b\u1ee9c t\u01b0\u1eddng. C\u00e1c b\u00e8 trong t\u00ecnh hu\u1ed1ng n\u00e0y kh\u00f4ng t\u1ea1o th\u00e0nh m\u1ed9t ph\u1ea7n nh\u00f4 ra gi\u00e1c m\u1ea1c \u0111\u1ec3 b\u1ea3o v\u1ec7 c\u1ea5u tr\u00fac kh\u1ecfi s\u1ef1 k\u1ebft t\u1ee7a. \u0110\u1ec3 b\u1ea3o v\u1ec7 c\u00e1c b\u1ee9c t\u01b0\u1eddng, m\u1ed9t c\u1ed1ng \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t, \u0111\u01b0\u1ee3c g\u1eafn tr\u00ean nh\u1eefng con th\u1ecf \u0111\u00f3ng \u0111inh v\u00e0o c\u1ea1nh cu\u1ed1i.<\/li>\n<li>Bao b\u1ecdc -c\u1eaft b\u1eb1ng m\u1ed9t b\u1ee9c t\u01b0\u1eddng c\u1ee7a nh\u1eefng chi\u1ebfc b\u00e8 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng v\u1edbi s\u1ef1 ho\u00e0n h\u1ea3o \u0111\u1ec3 h\u00ecnh th\u00e0nh m\u1ed9t ph\u1ea7n nh\u00f4 ra. Mares \u0111\u01b0\u1ee3c g\u1eafn v\u00e0o b\u00e8 b\u1eb1ng \u0111inh sau khi x\u00e2y d\u1ef1ng khung Rafter.<\/li>\n<li>Nh\u1eefng chi\u1ebfc b\u00e8 ban \u0111\u1ea7u c\u1eaft qua chi\u1ec1u d\u00e0i c\u1ee7a gi\u00e1c m\u1ea1c nh\u00f4 ra. \u1ede \u0111o\u1ea1n d\u01b0\u1edbi c\u1ee7a ch\u00e2n Rafter, c\u00e1c v\u1ebft c\u1eaft \u0111\u01b0\u1ee3c ch\u1ecdn d\u01b0\u1edbi d\u1ea1ng m\u1ed9t g\u00f3c. \u0110\u1ec3 h\u00ecnh th\u00e0nh c\u00e1c con l\u0103n, Rafters r\u00fat lui t\u1eeb c\u1ea1nh d\u01b0\u1edbi \u0111\u1ebfn chi\u1ec1u r\u1ed9ng c\u1ee7a gi\u00e1c m\u1ea1c. C\u1eaft gi\u1ea3m l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u0103ng di\u1ec7n t\u00edch h\u1ed7 tr\u1ee3 c\u1ee7a ch\u00e2n rafter v\u00e0 \u0111\u1ec3 c\u00e0i \u0111\u1eb7t c\u00e1c n\u00fat h\u1ed7 tr\u1ee3.<\/li>\n<\/ol>\n<p>Khi x\u00e1c \u0111\u1ecbnh chi\u1ec1u d\u00e0i c\u1ee7a ch\u00e2n rafter, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i xem x\u00e9t c\u00e1c t\u00f9y ch\u1ecdn \u0111\u1ec3 g\u1eafn khung m\u00e1i v\u00e0o v\u01b0\u01a1ng mi\u1ec7n ph\u00eda tr\u00ean c\u1ee7a nh\u00e0 g\u1ed7, l\u1ed1i \u0111i ho\u1eb7c mauerlat. T\u00ednh to\u00e1n \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n d\u1ecdc theo chi\u1ec1u d\u00e0i c\u1ee7a s\u01b0\u1eddn tr\u00ean c\u1ee7a b\u00e8, xem x\u00e9t k\u00edch th\u01b0\u1edbc c\u1ee7a r\u0103ng, n\u1ebfu n\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o th\u00e0nh \u0111\u01a1n v\u1ecb k\u1ebft n\u1ed1i th\u1ea5p h\u01a1n, n\u1ebfu vi\u1ec7c c\u00e0i \u0111\u1eb7t rafter \u0111\u01b0\u1ee3c ngh\u0129 \u0111\u1ebfn b\u1eb1ng c\u00e1ch tu\u00f4n ra v\u1edbi \u0111\u01b0\u1eddng vi\u1ec1n c\u1ee7a ng\u00f4i nh\u00e0.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\"  src=\"\/wp-content\/uploads\/2024\/07\/kak-rasschitat-stropila-dlja-kryshi-opredelenie_5.jpg\"><\/p>\n<p>\u0110\u1ed9 d\u00e0i \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh \u1edf s\u01b0\u1eddn tr\u00ean c\u1ee7a b\u00e8 c\u1ed9ng v\u1edbi ph\u1ea7n nh\u00f4 ra n\u1ebfu ch\u00e2n rafter b\u1ecb c\u1eaft ra v\u1edbi vi\u1ec7c lo\u1ea1i b\u1ecf gi\u00e1c m\u1ea1c trong t\u00e2m tr\u00ed. H\u00e3y nh\u1edb r\u1eb1ng trong khi s\u1eed d\u1ee5ng Triangle Trash l\u00e0m t\u0103ng \u0111\u00e1ng k\u1ec3 c\u1ea5u tr\u00fac c\u1ee7a khung Rafter, n\u00f3 c\u0169ng l\u00e0m suy gi\u1ea3m c\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a h\u1ec7 th\u1ed1ng. Do \u0111\u00f3, h\u1ec7 s\u1ed1 0.8 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng khi x\u00e1c \u0111\u1ecbnh kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c c\u1ee7a b\u00e8 v\u1edbi c\u00e1c g\u00f3c \u0111\u01b0\u1ee3c ch\u1ecdn.<\/p>\n<p>Ti\u00eau chu\u1ea9n 55 cm l\u00e0 chi\u1ec1u r\u1ed9ng trung b\u00ecnh c\u1ee7a vi\u1ec7c lo\u1ea1i b\u1ecf gi\u00e1c m\u1ea1c. Tuy nhi\u00ean, s\u1ef1 ph\u00e2n t\u00e1n c\u00f3 th\u1ec3 dao \u0111\u1ed9ng t\u1eeb 10 \u0111\u1ebfn 70 tr\u1edf l\u00ean. Ph\u00e9p chi\u1ebfu c\u1ee7a vi\u1ec7c lo\u1ea1i b\u1ecf gi\u00e1c m\u1ea1c tr\u00ean m\u1eb7t ph\u1eb3ng ngang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c t\u00ednh to\u00e1n.<\/p>\n<p>C\u00e1c gi\u00e1 tr\u1ecb t\u1ed1i \u0111a \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c \u0111\u1eb7c t\u00ednh s\u1ee9c m\u1ea1nh c\u1ee7a v\u1eadt li\u1ec7u. V\u00ed d\u1ee5, \u0111\u1ec3 ng\u0103n ch\u1eb7n kh\u1ed1i l\u01b0\u1ee3ng tuy\u1ebft t\u00edch t\u1ee5 d\u1ecdc theo m\u00e1i nh\u00e0 nh\u00f4 ra kh\u1ecfi c\u1ea1nh c\u1ee7a gi\u00e1c m\u1ea1c, c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t c\u1ee7a b\u1ed9 chuy\u1ec3n \u0111\u1ed5i kh\u00f4ng khuy\u00ean b\u1ea1n n\u00ean \u0111\u1eb7t m\u00e1i nh\u00e0 ph\u00eda sau c\u00e1c b\u1ee9c t\u01b0\u1eddng \u1edf kho\u1ea3ng c\u00e1ch h\u01a1n 10 cm.<\/p>\n<p>C\u00f3 ph\u1ea7n nh\u00f4 ra l\u1edbn tr\u00ean m\u00e1i d\u1ed1c kh\u00f4ng ph\u1ea3i l\u00e0 \u0111i\u1ec3n h\u00ecnh; B\u1ea5t k\u1ec3 v\u1eadt li\u1ec7u, c\u00e1c gi\u00e1c m\u1ea1c kh\u00f4ng l\u00e0m cho m\u00e1i nh\u00e0 35 \u0111\u1ebfn 45 cm r\u1ed9ng h\u01a1n. Tuy nhi\u00ean, c\u00e1c t\u00f2a nh\u00e0 c\u00f3 \u0111\u1ed9 d\u1ed1c l\u00ean \u0111\u1ebfn ba m\u01b0\u01a1i \u0111\u1ed9 c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t v\u1edbi m\u1ed9t gi\u00e1c m\u1ea1c r\u1ed9ng, s\u1ebd ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t lo\u1ea1i t\u00e1n \u1edf nh\u1eefng n\u01a1i c\u00f3 nhi\u1ec1u \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi. N\u1ebfu thi\u1ebft k\u1ebf m\u00e1i nh\u00e0 c\u00f3 b\u1ea3y m\u01b0\u01a1i kh\u00f4ng gian ng\u00f4 tr\u1edf l\u00ean, nh\u1eefng khu v\u1ef1c \u0111\u00f3 \u0111\u01b0\u1ee3c gia c\u1ed1 b\u1eb1ng gi\u00e1 h\u1ed7 tr\u1ee3 th\u00eam.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\"  src=\"\/wp-content\/uploads\/2024\/07\/kak-rasschitat-stropila-dlja-kryshi-opredelenie_6.jpg\"><\/p>\n<h3>C\u00e1ch t\u00ednh kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c<\/h3>\n<p>Khung k\u00e8o \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng b\u1eb1ng v\u1eadt li\u1ec7u l\u00e0m t\u1eeb g\u1ed7 l\u00e1 kim. D\u1ea7m ho\u1eb7c v\u00e1n \u0111\u00e3 chu\u1ea9n b\u1ecb s\u1eb5n kh\u00f4ng \u0111\u01b0\u1ee3c c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng th\u1ea5p h\u01a1n d\u1ea7m ho\u1eb7c v\u00e1n th\u1ee9 hai.<\/p>\n<p>H\u1ec7 v\u00ec k\u00e8o m\u00e1i d\u1ed1c ho\u1ea1t \u0111\u1ed9ng tr\u00ean c\u01a1 s\u1edf c\u00e1c b\u1ed9 ph\u1eadn b\u1ecb n\u00e9n, cong, u\u1ed1n cong. Khi n\u00f3i \u0111\u1ebfn kh\u1ea3 n\u0103ng ch\u1ed1ng u\u1ed1n v\u00e0 n\u00e9n, g\u1ed7 h\u1ea1ng hai c\u00f3 hi\u1ec7u su\u1ea5t \u0111\u00e1ng ng\u01b0\u1ee1ng m\u1ed9. S\u1ef1 \u0111a d\u1ea1ng \u0111\u1ea7u ti\u00ean ch\u1ec9 c\u1ea7n thi\u1ebft n\u1ebfu c\u1ea5u tr\u00fac c\u1ee7a c\u1ea5u tr\u00fac cho ph\u00e9p k\u00e9o d\u00e0i.<\/p>\n<p>C\u00e1c h\u1ec7 th\u1ed1ng Raratile t\u1eadp trung v\u00e0o k\u00edch th\u01b0\u1edbc ti\u00eau chu\u1ea9n c\u1ee7a d\u00f2ng ch\u1ea3y \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1edfi vi\u1ec7c \u0111\u1ed5i m\u1edbi g\u1ed7 x\u1ebb v\u00e0 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng t\u1eeb c\u00e1c t\u1ea5m v\u00e1n ho\u1eb7c g\u1ed7 \u0111\u01b0\u1ee3c ch\u1ecdn v\u1edbi \u0111\u1ed9 b\u1ec1n nh\u1ea5t \u0111\u1ecbnh.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\"  src=\"\/wp-content\/uploads\/2024\/07\/kak-rasschitat-stropila-dlja-kryshi-opredelenie_7.jpg\"><\/p>\n<p>Hai tr\u1ea1ng th\u00e1i d\u00f9ng \u0111\u1ec3 t\u00ednh kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c c\u1ee7a ch\u00e2n k\u00e8o nh\u01b0 sau:<\/p>\n<ul>\n<li><strong>\u0110\u00e3 t\u00ednh to\u00e1n.<\/strong> T\u00ecnh tr\u1ea1ng trong \u0111\u00f3 do t\u1ea3i tr\u1ecdng t\u00e1c d\u1ee5ng, k\u1ebft c\u1ea5u b\u1ecb ph\u00e1 h\u1ee7y. C\u00e1c t\u00ednh to\u00e1n \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n cho t\u1ed5ng t\u1ea3i, bao g\u1ed3m tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a b\u00e1nh m\u00e1i, t\u1ea3i tr\u1ecdng gi\u00f3, c\u00f3 t\u00ednh \u0111\u1ebfn s\u1ed1 l\u01b0\u1ee3ng t\u1ea7ng, kh\u1ed1i l\u01b0\u1ee3ng tuy\u1ebft, c\u00f3 t\u00ednh \u0111\u1ebfn \u0111\u1ed9 d\u1ed1c c\u1ee7a m\u00e1i nh\u00e0.<\/li>\n<li><strong>Quy ph\u1ea1m.<\/strong> M\u1ed9t \u0111i\u1ec1u ki\u1ec7n trong \u0111\u00f3 h\u1ec7 th\u1ed1ng rafter \u0111ang u\u1ed1n cong, nh\u01b0ng s\u1ef1 ph\u00e1 h\u1ee7y c\u1ee7a h\u1ec7 th\u1ed1ng kh\u00f4ng x\u1ea3y ra. Th\u01b0\u1eddng kh\u00f4ng th\u1ec3 v\u1eadn h\u00e0nh m\u00e1i nh\u00e0 \u1edf tr\u1ea1ng th\u00e1i n\u00e0y, nh\u01b0ng sau khi s\u1eeda ch\u1eefa, n\u00f3 kh\u00e1 ph\u00f9 h\u1ee3p \u0111\u1ec3 s\u1eed d\u1ee5ng th\u00eam.<\/li>\n<\/ul>\n<p>Trong m\u1ed9t t\u00ednh to\u00e1n \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp h\u1ee3p l\u00fd, \u0111i\u1ec1u ki\u1ec7n ti\u00ean quy\u1ebft th\u1ee9 hai b\u1eb1ng 70% gi\u00e1 tr\u1ecb ban \u0111\u1ea7u. T.e. C\u00e1c gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n c\u1ea7n ph\u1ea3i \u0111\u01b0\u1ee3c nh\u00e2n l\u00ean v\u1edbi h\u1ec7 s\u1ed1 0.7 \u0110\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c c\u00e1c ch\u1ec9 s\u1ed1 quy \u0111\u1ecbnh.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\"  src=\"\/wp-content\/uploads\/2024\/07\/kak-rasschitat-stropila-dlja-kryshi-opredelenie_8.jpg\"><\/p>\n<p>C\u00e1c th\u1ebb \u0111\u01b0\u1ee3c g\u1eafn v\u00e0o SP 20.13330.2011 X\u00e1c \u0111\u1ecbnh t\u1ea3i tr\u1ecdng d\u1ef1a tr\u00ean d\u1eef li\u1ec7u kh\u00ed h\u1eadu c\u1ee7a khu v\u1ef1c x\u00e2y d\u1ef1ng. \u0110\u1ecbnh v\u1ecb th\u00e0nh ph\u1ed1 c\u1ee7a b\u1ea1n, ng\u00f4i l\u00e0ng g\u1ea7n nh\u1ea5t ho\u1eb7c khu \u0111\u1ecbnh c\u01b0 kh\u00e1c l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean trong vi\u1ec7c t\u00ecm ki\u1ebfm c\u00e1c gi\u00e1 tr\u1ecb quy \u0111\u1ecbnh tr\u00ean th\u1ebb. T\u1eeb \u0111\u00f3, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1ecdc c\u00e1c gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n v\u00e0 quy ph\u1ea1m t\u1eeb th\u1ebb.<\/p>\n<p>D\u1eef li\u1ec7u trung b\u00ecnh li\u00ean quan \u0111\u1ebfn t\u1ea3i tr\u1ecdng gi\u00f3 v\u00e0 tuy\u1ebft n\u00ean \u0111\u01b0\u1ee3c s\u1eeda \u0111\u1ed5i theo c\u00e1c t\u00ednh n\u0103ng ki\u1ebfn \u200b\u200btr\u00fac c\u1ee7a ng\u00f4i nh\u00e0. V\u00ed d\u1ee5, gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c tr\u00edch xu\u1ea5t t\u1eeb \u200b\u200bth\u1ebb c\u1ea7n \u0111\u01b0\u1ee3c chia th\u00e0nh c\u00e1c \u0111\u1ed9 d\u1ed1c ph\u00f9 h\u1ee3p v\u1edbi \u01b0\u1edbc t\u00ednh t\u0103ng gi\u00f3 cho khu v\u1ef1c. D\u1ecbch v\u1ee5 th\u1eddi ti\u1ebft \u0111\u1ecba ph\u01b0\u01a1ng c\u00f3 s\u1eb5n c\u00e1c b\u1ea3n in \u0111\u1ec3 b\u1ea1n c\u00f3 \u0111\u01b0\u1ee3c.<\/p>\n<p>V\u00ec s\u1ebd c\u00f3 \u00edt tuy\u1ebft h\u01a1n \u1edf ph\u00eda gi\u00f3 c\u1ee7a t\u00f2a nh\u00e0, ch\u1ec9 b\u00e1o \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n \u0111\u01b0\u1ee3c nh\u00e2n v\u1edbi 0.75. Ti\u1ec1n g\u1eedi tuy\u1ebft nh\u00e2n l\u00ean \u1edf \u0111\u00e2y v\u1edbi 1.25 V\u00ec h\u1ecd s\u1ebd t\u00edch l\u0169y \u1edf ph\u00eda leeward. Ph\u1ea7n leeward c\u1ee7a c\u1ea5u tr\u00fac th\u01b0\u1eddng \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng t\u1eeb c\u00e1c b\u1ea3ng \u0111\u01b0\u1ee3c gh\u00e9p n\u1ed1i, v\u00e0 ph\u1ea7n \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp v\u1edbi b\u00e8 c\u1ee7a b\u1ea3ng duy nh\u1ea5t c\u1ee7a h\u1ecd, trong n\u1ed7 l\u1ef1c th\u1ed1ng nh\u1ea5t v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00f4ng tr\u00ecnh c\u1ee7a m\u00e1i nh\u00e0.<\/p>\n<p>T\u1ed1t h\u01a1n l\u00e0 nh\u00e2n v\u1edbi 1.25 n\u1ebfu kh\u00f4ng r\u00f5 \u0111\u1ed9 d\u1ed1c n\u00e0o s\u1ebd l\u00e0 leeward v\u00e0 m\u1eb7t kh\u00e1c, m\u1eb7t kh\u00e1c. N\u1ebfu gi\u00e1 g\u1ed7 kh\u00f4ng t\u0103ng \u0111\u00e1ng k\u1ec3, kh\u00f4ng c\u00f3 t\u00e1c h\u1ea1i n\u00e0o trong vi\u1ec7c bi\u1ec7n ph\u00e1p ph\u00f2ng ng\u1eeba th\u00eam m\u1ed9t ch\u00fat.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\"  src=\"\/wp-content\/uploads\/2024\/07\/kak-rasschitat-stropila-dlja-kryshi-opredelenie_9.jpg\"><\/p>\n<p>Tr\u1ecdng l\u01b0\u1ee3ng tuy\u1ebft \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n c\u1ee7a th\u1ebb v\u1eabn c\u00f3 th\u1ec3 thay \u0111\u1ed5i d\u1ef1a tr\u00ean m\u1ee9c \u0111\u1ed9 d\u1ed1c c\u1ee7a m\u00e1i nh\u00e0. Khi tuy\u1ebft \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf g\u00f3c 60 \u0111\u1ed9, n\u00f3 tr\u01b0\u1ee3t ra kh\u1ecfi s\u01b0\u1eddn d\u1ed1c ngay l\u1eadp t\u1ee9c v\u00e0 kh\u00f4ng c\u00f3 b\u1ea5t k\u1ef3 s\u1ef1 do d\u1ef1 n\u00e0o. H\u1ec7 s\u1ed1 hi\u1ec7u ch\u1ec9nh kh\u00f4ng \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong c\u00e1c t\u00ednh to\u00e1n cho m\u00e1i d\u1ed1c nh\u01b0 v\u1eady. V\u00ec tuy\u1ebft \u0111\u00e3 c\u00f3 th\u1ec3 n\u00e1n l\u1ea1i v\u1edbi \u0111\u1ed9 l\u1ec7ch th\u1ea5p h\u01a1n, m\u1ed9t ph\u1ee5 gia \u1edf d\u1ea1ng h\u1ec7 s\u1ed1 0.33 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho \u0111\u1ed9 d\u1ed1c 50 \u0111\u1ed9 v\u00e0 0.66 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho \u0111\u1ed9 d\u1ed1c 40 \u0111\u1ed9.<\/p>\n<p>B\u1ea3n \u0111\u1ed3 t\u01b0\u01a1ng \u1ee9ng x\u00e1c \u0111\u1ecbnh t\u1ea3i gi\u00f3 theo c\u00e1ch t\u01b0\u01a1ng t\u1ef1. S\u1eeda \u0111\u1ed5i gi\u00e1 tr\u1ecb theo kh\u00ed h\u1eadu \u0111\u1ed9c \u0111\u00e1o c\u1ee7a khu v\u1ef1c v\u00e0 chi\u1ec1u cao c\u1ee7a ng\u00f4i nh\u00e0.<\/p>\n<p>T\u00ecm t\u1ea3i t\u1ed1i \u0111a tr\u00ean c\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a h\u1ec7 th\u1ed1ng Rafter theo k\u1ebf ho\u1ea1ch y\u00eau c\u1ea7u th\u00eam c\u00e1c gi\u00e1 tr\u1ecb t\u1ea1m th\u1eddi v\u00e0 kh\u00f4ng \u0111\u1ed5i \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c c\u1ee7a c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u00f3. Kh\u00f4ng ai s\u1ebd c\u1ee7ng c\u1ed1 m\u00e1i nh\u00e0 tr\u01b0\u1edbc khi tuy\u1ebft r\u01a1i, m\u1eb7c d\u00f9 t\u1ed1t h\u01a1n l\u00e0 l\u1eafp \u0111\u1eb7t c\u00e1c mi\u1ebfng \u0111\u1ec7m d\u1ecdc an to\u00e0n trong c\u0103n g\u00e1c c\u1ee7a nh\u00e0 n\u01b0\u1edbc.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\"  src=\"\/wp-content\/uploads\/2024\/07\/kak-rasschitat-stropila-dlja-kryshi-opredelenie_10.jpg\"><\/p>\n<p>Tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a m\u1ecdi th\u00e0nh ph\u1ea7n c\u1ee7a b\u00e1nh m\u00e1i, bao g\u1ed3m c\u1ea3 c\u00e1ch nhi\u1ec7t, vi\u1ec1n b\u00ean trong, m\u00e1i nh\u00e0 v\u00e0 th\u00f9ng \u0111\u01b0\u1ee3c \u0111\u1eb7t tr\u00ean \u0111\u1ec9nh \u0111\u00f3, l\u00e0 c\u1ea7n thi\u1ebft cho kh\u1ed1i l\u01b0\u1ee3ng tuy\u1ebft v\u00e0 l\u1ef1c \u00e9p c\u1ee7a gi\u00f3 trong c\u00e1c t\u00ednh to\u00e1n. \u0110\u00f3 l\u00e0 th\u1ef1c t\u1ebf ph\u1ed5 bi\u1ebfn \u0111\u1ec3 b\u1ecf qua tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a c\u00e1c m\u00e0ng ch\u1ed1ng th\u1ea5m n\u01b0\u1edbc v\u00e0 m\u00e0ng.<\/p>\n<p>Nh\u00e0 s\u1ea3n xu\u1ea5t cung c\u1ea5p th\u00f4ng tin v\u1ec1 tr\u1ecdng l\u01b0\u1ee3ng v\u1eadt li\u1ec7u trong h\u1ed9 chi\u1ebfu k\u1ef9 thu\u1eadt. Khi ti\u1ebfp c\u1eadn, th\u00f4ng tin v\u1ec1 thanh c\u1ee7a thanh v\u00e0 c\u00e1c b\u1ea3ng \u0111\u01b0\u1ee3c thu th\u1eadp. Trong khi kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a th\u00f9ng \u0111\u01b0\u1ee3c cho ph\u00e9p b\u1edfi m\u1ed9t m\u00e9t c\u1ee7a ph\u00e9p chi\u1ebfu c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng tr\u1ecdng l\u01b0\u1ee3ng trung b\u00ecnh 500 500 550550 kg\/m 3 cho m\u1ed9t m\u00e9t kh\u1ed1i g\u1ed7 v\u00e0 600 th\u00e9p650 kg 3 cho m\u1ed9t kh\u1ed1i l\u01b0\u1ee3ng osp ho\u1eb7c v\u00e1n \u00e9p t\u01b0\u01a1ng t\u1ef1.<\/p>\n<p>C\u00e1c gi\u00e1 tr\u1ecb t\u1ea3i \u0111\u01b0\u1ee3c th\u1ec3 hi\u1ec7n b\u1eb1ng kg\/m 2 l\u00e0 c\u00e1c gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c cung c\u1ea5p trong snips. Rafter, m\u1eb7t kh\u00e1c, ch\u1ec9 c\u1ea3m nh\u1eadn v\u00e0 h\u1ed7 tr\u1ee3 t\u1ea3i \u00e1p l\u1ef1c tr\u1ef1c ti\u1ebfp cho ph\u1ea7n t\u1eed tuy\u1ebfn t\u00ednh n\u00e0y. T\u1ed5ng c\u00e1c gi\u00e1 tr\u1ecb b\u1ea3ng t\u1ef1 nhi\u00ean c\u1ee7a t\u1ea3i v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a m\u00e1i nh\u00e0 \u0111\u01b0\u1ee3c nh\u00e2n v\u1edbi b\u01b0\u1edbc c\u00e0i \u0111\u1eb7t ch\u00e2n rafter \u0111\u1ec3 t\u00ednh to\u00e1n ch\u00ednh x\u00e1c t\u1ea3i tr\u1ecdng tr\u00ean b\u00e8.<\/p>\n<p>B\u01b0\u1edbc ho\u1eb7c kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c b\u00e8, c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thay \u0111\u1ed5i \u0111\u1ec3 t\u0103ng ho\u1eb7c gi\u1ea3m gi\u00e1 tr\u1ecb t\u1ea3i \u0111\u01b0\u1ee3c cung c\u1ea5p cho c\u00e1c tham s\u1ed1 tuy\u1ebfn t\u00ednh. \u0110\u1ea1t \u0111\u01b0\u1ee3c c\u00e1c gi\u00e1 tr\u1ecb l\u00fd t\u01b0\u1edfng cho khu v\u1ef1c thu t\u1ea3i \u0111\u1ec3 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a khung c\u1ee7a m\u00e1i nh\u00e0 \u0111\u01b0\u1ee3c.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\"  src=\"\/wp-content\/uploads\/2024\/07\/kak-rasschitat-stropila-dlja-kryshi-opredelenie_11.jpg\"><\/p>\n<h2>X\u00e1c \u0111\u1ecbnh th\u1eadp t\u1ef1 gi\u00e1 c\u1ee7a b\u00e8<\/h2>\n<p>Ch\u1ee9c n\u0103ng c\u1ee7a ch\u00e2n b\u00e8 tr\u00ean m\u00e1i nh\u00e0 v\u1edbi \u0111\u1ed9 d\u1ed1c kh\u00e1c nhau kh\u00f4ng r\u00f5 r\u00e0ng. M\u1ed9t l\u1ef1c n\u00e9n \u0111\u01b0\u1ee3c th\u00eam v\u00e0o c\u00e1c ch\u1ea5t t\u01b0\u01a1ng t\u1ef1 c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng d\u1ed1c, ho\u1ea1t \u0111\u1ed9ng ch\u1ee7 y\u1ebfu nh\u01b0 m\u1ed9t kho\u1ea3nh kh\u1eafc u\u1ed1n cong tr\u00ean c\u00e1c b\u00e8 c\u1ee7a c\u00e1c c\u1ea5u tr\u00fac nh\u1eb9. Do \u0111\u00f3, \u0111\u1ed9 d\u1ed1c c\u1ee7a \u0111\u1ed9 d\u1ed1c ph\u1ea3i \u0111\u01b0\u1ee3c xem x\u00e9t khi t\u00ednh to\u00e1n ph\u1ea7n c\u1ee7a b\u00e8.<\/p>\n<h3>T\u00ednh to\u00e1n cho c\u00e1c c\u1ea5u tr\u00fac c\u00f3 \u0111\u1ed9 d\u1ed1c l\u00ean \u0111\u1ebfn 30 \u0111\u1ed9<\/h3>\n<p>Ch\u1ec9 c\u00f3 \u1ee9ng su\u1ea5t u\u1ed1n ho\u1ea1t \u0111\u1ed9ng tr\u00ean ch\u00e2n rafter c\u1ee7a m\u00e1i nh\u00e0 c\u1ee7a \u0111\u1ed9 d\u1ed1c \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh. Ch\u00fang \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n v\u1edbi t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i t\u1ea3i c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng t\u1ea1i th\u1eddi \u0111i\u1ec3m u\u1ed1n cong t\u1ed1i \u0111a. H\u01a1n n\u1eefa, c\u00e1c t\u00ednh to\u00e1n cho c\u00e1c ch\u1ec9 s\u1ed1 t\u1ed1i \u0111a s\u1eed d\u1ee5ng t\u1ea3i tho\u00e1ng qua ho\u1eb7c kh\u00ed h\u1eadu,.<\/p>\n<p>Trung t\u00e2m c\u1ee7a ch\u00e2n rafter l\u00e0 n\u01a1i u\u1ed1n cong t\u1ed1i \u0111a x\u1ea3y ra trong b\u00e8, ch\u1ec9 c\u00f3 h\u1ed7 tr\u1ee3 d\u01b0\u1edbi c\u1ea3 hai c\u1ea1nh c\u1ee7a ch\u00fang. Gi\u1eefa c\u1ea3 hai nh\u1ecbp s\u1ebd nh\u1eadn \u0111\u01b0\u1ee3c nh\u1eefng kho\u1ea3nh kh\u1eafc u\u1ed1n cong t\u1ed1i \u0111a n\u1ebfu rafter bao g\u1ed3m hai ch\u00f9m \u0111\u01a1n gi\u1ea3n v\u00e0 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 b\u1edfi ba \u0111i\u1ec3m.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\"  src=\"\/wp-content\/uploads\/2024\/07\/kak-rasschitat-stropila-dlja-kryshi-opredelenie_12.jpg\"><\/p>\n<p>S\u1ef1 u\u1ed1n cong t\u1ed1i \u0111a trong b\u00e8 v\u1edbi ba h\u1ed7 tr\u1ee3 s\u1ebd x\u1ea3y ra g\u1ea7n h\u1ed7 tr\u1ee3 trung t\u00e2m, nh\u01b0ng kh\u00f4ng ch\u00ednh x\u00e1c \u1edf \u0111\u00f3. C\u00f3 m\u1ed9t s\u1ef1 h\u1ed7 tr\u1ee3 b\u00ean d\u01b0\u1edbi khu v\u1ef1c u\u1ed1n; Kh\u00f4ng gi\u1ed1ng nh\u01b0 trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p tr\u01b0\u1edbc, n\u00f3 s\u1ebd ch\u1ec9 ra.<\/p>\n<p>Hai y\u00eau c\u1ea7u ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u00e1p \u1ee9ng cho ch\u00e2n Rafter c\u1ee7a h\u1ec7 th\u1ed1ng \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng:<\/p>\n<ul>\n<li>\u0110i\u1ec7n \u00e1p b\u00ean trong h\u00ecnh th\u00e0nh trong b\u00e8 trong qu\u00e1 tr\u00ecnh u\u1ed1n cong do t\u1ea3i tr\u1ecdng \u0111\u01b0\u1ee3c g\u1eafn v\u00e0o n\u00f3 ph\u1ea3i nh\u1ecf h\u01a1n gi\u00e1 tr\u1ecb t\u00ednh to\u00e1n c\u1ee7a \u0111i\u1ec7n tr\u1edf c\u1ee7a g\u1ed7 \u0111\u1ec3 u\u1ed1n cong.<\/li>\n<li>\u0110\u1ed9 l\u1ec7ch c\u1ee7a ch\u00e2n rafter ph\u1ea3i nh\u1ecf h\u01a1n gi\u00e1 tr\u1ecb \u0111\u1ed9 l\u1ec7ch chu\u1ea9n h\u00f3a, \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh theo t\u1ef7 l\u1ec7 l\/200, t.e. U\u1ed1n ph\u1ea7n t\u1eed ch\u1ec9 \u0111\u01b0\u1ee3c ph\u00e9p cho m\u1ed9t ph\u1ea7n hai ph\u1ea7n tr\u0103m c\u1ee7a chi\u1ec1u d\u00e0i th\u1ef1c c\u1ee7a n\u00f3.<\/li>\n<\/ul>\n<p>Nh\u1eefng y\u00eau c\u1ea7u n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c \u0111\u00e1p \u1ee9ng b\u1eb1ng c\u00e1c t\u00ednh to\u00e1n b\u1ed5 sung trong l\u1ef1a ch\u1ecdn tu\u1ea7n t\u1ef1 c\u1ee7a k\u00edch th\u01b0\u1edbc ch\u00e2n rafter. Ph\u1ea7n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n b\u1eb1ng m\u1ed9t trong hai c\u00f4ng th\u1ee9c. M\u1ed9t trong s\u1ed1 ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00ednh chi\u1ec1u cao c\u1ee7a b\u1ea3ng ho\u1eb7c g\u1ed7 d\u1ef1a tr\u00ean \u0111\u1eb7c t\u1ea3 \u0111\u1ed9 d\u00e0y t\u00f9y \u00fd. \u0110\u1ed9 d\u00e0y \u1edf b\u1ea5t k\u1ef3 \u0111\u1ed9 cao n\u00e0o c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00f4ng th\u1ee9c th\u1ee9 hai.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\"  src=\"\/wp-content\/uploads\/2024\/07\/kak-rasschitat-stropila-dlja-kryshi-opredelenie_13.jpg\"><\/p>\n<p>N\u00f3 \u0111\u1ee7 \u0111\u1ec3 s\u1eed d\u1ee5ng ch\u1ec9 m\u1ed9t trong c\u00e1c c\u00f4ng th\u1ee9c trong c\u00e1c t\u00ednh to\u00e1n; C\u1ea3 hai \u0111\u1ec1u kh\u00f4ng b\u1eaft bu\u1ed9c. Sau c\u00e1c t\u00ednh to\u00e1n, tr\u1ea1ng th\u00e1i gi\u1edbi h\u1ea1n th\u1ee9 nh\u1ea5t v\u00e0 th\u1ee9 hai x\u00e1c minh k\u1ebft qu\u1ea3. M\u1ed9t ch\u1ec9 s\u1ed1 t\u00f9y \u00fd \u0111\u01b0\u1ee3c th\u00eam v\u00e0o c\u00f4ng th\u1ee9c c\u00f3 th\u1ec3 gi\u1ea3m n\u1ebfu gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n cho th\u1ea5y m\u1ed9t bi\u00ean \u0111\u1ed9 s\u1ee9c m\u1ea1nh \u1ea5n t\u01b0\u1ee3ng \u0111\u1ec3 tr\u00e1nh tr\u1ea3 qu\u00e1 nhi\u1ec1u cho v\u1eadt li\u1ec7u.<\/p>\n<p>M\u1ed9t gi\u00e1 tr\u1ecb t\u00f9y \u00fd \u0111\u01b0\u1ee3c t\u0103ng l\u00ean n\u1ebfu gi\u00e1 tr\u1ecb t\u00ednh to\u00e1n c\u1ee7a u\u1ed1n cong c\u1ee7a u\u1ed1n cong l\u1edbn h\u01a1n l\/200. Vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n d\u1ef1a tr\u00ean c\u00e1c k\u00edch c\u1ee1 chung c\u1ee7a g\u1ed7 \u0111\u01b0\u1ee3c cung c\u1ea5p \u0111\u1ec3 b\u00e1n. Do \u0111\u00f3, ch\u1ecdn m\u1eb7t c\u1eaft cho \u0111\u1ebfn khi t\u00ecm th\u1ea5y l\u1ef1a ch\u1ecdn t\u1ed1i \u01b0u v\u00e0 th\u1eddi \u0111i\u1ec3m \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n.<\/p>\n<p>H\u00e3y \u0111\u1ec3 ch\u00fang t\u00f4i ki\u1ec3m tra m\u1ed9t v\u00ed d\u1ee5 t\u00ednh to\u00e1n c\u01a1 b\u1ea3n s\u1eed d\u1ee5ng c\u00f4ng th\u1ee9c B = 6WH\u00b2. Gi\u1ea3 s\u1eed r\u1eb1ng W l\u00e0 t\u1ef7 l\u1ec7 c\u1ee7a m\/rhut v\u00e0 h = 15 cm. S\u1eed d\u1ee5ng c\u00f4ng th\u1ee9c G \u00d7 L 2\/8, ch\u00fang t\u00f4i x\u00e1c \u0111\u1ecbnh gi\u00e1 tr\u1ecb c\u1ee7a m. \u1ede \u0111\u00e2y, g bi\u1ec3u th\u1ecb t\u1ed5ng t\u1ea3i \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng theo chi\u1ec1u d\u1ecdc cho ch\u00e2n rafter v\u00e0 l l\u00e0 chi\u1ec1u d\u00e0i nh\u1ecbp, l\u00e0 4 m.<\/p>\n<p>Rhut Theo ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt, ch\u00fang t\u00f4i l\u1ea5y 130 kg\/cm 2 g\u1ed7 t\u1eeb c\u00e2y l\u00e1 kim. Gi\u1ea3 s\u1eed ch\u00fang t\u00f4i \u0111\u00e3 ho\u00e0n th\u00e0nh t\u1ed5ng t\u1ea3i v\u00e0 n\u00f3 \u0111\u00e3 xu\u1ea5t hi\u1ec7n l\u00e0 345 kg\/m. Sau \u0111\u00f3:<\/p>\n<p>M \u00d7 16m 2\/8 = 690 kg\/m = 345 kg\/m<\/p>\n<p>Ch\u00fang t\u00f4i chia k\u1ebft qu\u1ea3 cho 100 \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i n\u00f3 th\u00e0nh kg\/cm v\u00e0 k\u1ebft qu\u1ea3 l\u00e0 0.690 kg\/cm.<\/p>\n<p>0.00531 cm b\u1eb1ng w = 0.690 kg\/cm\/130 kg\/cm 2.<\/p>\n<p>B = 7.16 cm = 6 \u00d7 0.00531 cm \u00d7 15 2 cm<\/p>\n<p>Ch\u00fang t\u00f4i l\u00e0m tr\u00f2n k\u1ebft qu\u1ea3 v\u00ec n\u00f3 n\u00ean \u0111\u01b0\u1ee3c b\u1ecdc v\u00e0 th\u1ea5y r\u1eb1ng m\u1ed9t ch\u00f9m tia 150 \u00d7 75 mm l\u00e0 b\u1eaft bu\u1ed9c \u0111\u1ec3 l\u1eafp \u0111\u1eb7t b\u00e8, xem x\u00e9t t\u1ea3i trong v\u00ed d\u1ee5 t\u1ea3i tr\u1ecdng.<\/p>\n<p>Ch\u00fang t\u00f4i x\u00e1c minh k\u1ebft qu\u1ea3 c\u1ee7a c\u1ea3 hai \u0111i\u1ec1u ki\u1ec7n v\u00e0 thi\u1ebft l\u1eadp s\u1ef1 ph\u00f9 h\u1ee3p c\u1ee7a v\u1eadt li\u1ec7u v\u1edbi m\u1eb7t c\u1eaft hi\u1ec7n t\u1ea1i. F = 1.39; = 0.0036<\/p>\n<h3>\u0110\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng Rafter c\u00f3 \u0111\u1ed9 d\u1ed1c h\u01a1n 30 \u0111\u1ed9<\/h3>\n<p>Rafter tr\u00ean m\u00e1i d\u1ed1c h\u01a1n ba m\u01b0\u01a1i \u0111\u1ed9 ph\u1ea3i ch\u1ecbu \u0111\u01b0\u1ee3c l\u1ef1c n\u00e9n t\u00e1c d\u1ee5ng l\u00ean ch\u00fang d\u1ecdc theo tr\u1ee5c c\u1ee7a ch\u00ednh h\u1ecd ngo\u00e0i Bend. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, c\u00e1c b\u00e8 ph\u1ea3i \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n d\u1ef1a tr\u00ean \u1ee9ng su\u1ea5t b\u00ean trong ngo\u00e0i vi\u1ec7c x\u00e1c minh s\u1ee9c \u0111\u1ec1 kh\u00e1ng \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp \u1edf tr\u00ean v\u00e0 u\u1ed1n cong c\u1ee7a u\u1ed1n cong.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\"  src=\"\/wp-content\/uploads\/2024\/07\/kak-rasschitat-stropila-dlja-kryshi-opredelenie_14.jpg\"><\/p>\n<p>C\u00e1c b\u01b0\u1edbc t\u01b0\u01a1ng t\u1ef1 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n cho T.E. h\u00e0nh \u0111\u1ed9ng, nh\u01b0ng c\u1ea7n ph\u1ea3i th\u1ef1c hi\u1ec7n c\u00f4ng vi\u1ec7c x\u00e1c minh h\u01a1n m\u1ed9t ch\u00fat. T\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1eady, chi\u1ec1u cao t\u00f9y \u00fd ho\u1eb7c \u0111\u1ed9 d\u00e0y t\u00f9y \u00fd c\u1ee7a g\u1ed7 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp v\u00e0 v\u1edbi s\u1ef1 h\u1ed7 tr\u1ee3 c\u1ee7a n\u00f3, tham s\u1ed1 ph\u1ea7n th\u1ee9 hai \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n. Ti\u1ebfp theo, s\u1ef1 tu\u00e2n th\u1ee7 c\u1ee7a ba \u0111i\u1ec1u ki\u1ec7n k\u1ef9 thu\u1eadt \u0111\u00e3 n\u00f3i \u1edf tr\u00ean, bao g\u1ed3m c\u1ea3 \u0111i\u1ec7n tr\u1edf n\u00e9n.<\/p>\n<p>N\u1ebfu \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u, c\u00e1c gi\u00e1 tr\u1ecb t\u00f9y \u00fd \u0111\u01b0\u1ee3c th\u00eam v\u00e0o c\u00f4ng th\u1ee9c t\u0103ng \u0111\u1ec3 t\u0103ng kh\u1ea3 n\u0103ng ch\u1ecbu l\u1ef1c c\u1ee7a Rafter. T\u00ednh to\u00e1n l\u1ea1i chi\u1ec1u cao ho\u1eb7c \u0111\u1ed9 d\u00e0y v\u1eadt li\u1ec7u l\u00e0 c\u1ea7n thi\u1ebft n\u1ebfu \u0111\u1ed9 v\u00f5ng quy quy v\u01b0\u1ee3t qua gi\u00e1 tr\u1ecb t\u00ednh to\u00e1n v\u00e0 bi\u00ean \u0111\u1ed9 c\u1ee7a c\u01b0\u1eddng \u0111\u1ed9 t\u01b0\u01a1ng \u0111\u1ed1i l\u1edbn.<\/p>\n<p>M\u1ed9t b\u1ea3ng s\u1ebd h\u1ed7 tr\u1ee3 l\u1ef1a ch\u1ecdn th\u00f4ng tin c\u01a1 b\u1ea3n c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u1ea1o ra c\u00e1c t\u00ednh to\u00e1n l\u00e0m gi\u1ea3m k\u00edch th\u01b0\u1edbc ti\u00eau chu\u1ea9n c\u1ee7a g\u1ed7 m\u00e0 ch\u00fang t\u00f4i s\u1ea3n xu\u1ea5t. Ch\u1ecdn chi\u1ec1u d\u00e0i v\u00e0 m\u1eb7t c\u1eaft c\u1ee7a ch\u00e2n Rafter cho c\u00e1c t\u00ednh to\u00e1n s\u01a1 b\u1ed9 s\u1ebd h\u1eefu \u00edch.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\"  src=\"\/wp-content\/uploads\/2024\/07\/kak-rasschitat-stropila-dlja-kryshi-opredelenie_15.jpg\"><\/p>\n<p>\u0110\u1ec3 t\u00ednh to\u00e1n b\u00e8 cho m\u00e1i nh\u00e0 c\u1ee7a b\u1ea1n, tr\u01b0\u1edbc ti\u00ean b\u1ea1n ph\u1ea3i x\u00e1c \u0111\u1ecbnh chi\u1ec1u d\u00e0i, m\u1eb7t c\u1eaft v\u00e0 c\u00f4ng su\u1ea5t t\u1ea3i t\u1ed1i \u0111a c\u1ee7a ch\u00fang. \u0110\u1ec3 b\u1eaft \u0111\u1ea7u, h\u00e3y t\u00ednh chi\u1ec1u d\u00e0i c\u1ee7a b\u00e8 theo y\u00eau c\u1ea7u b\u1eb1ng c\u00e1ch \u0111o chi\u1ec1u r\u1ed9ng c\u1ee7a m\u00e1i nh\u00e0 c\u1ee7a b\u1ea1n t\u1eeb t\u01b0\u1eddng \u0111\u1ebfn t\u01b0\u1eddng. B\u1edfi v\u00ec n\u00f3 x\u00e1c \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc t\u1ed5ng th\u1ec3 c\u1ee7a c\u1ea5u tr\u00fac m\u00e1i nh\u00e0 c\u1ee7a b\u1ea1n, ph\u00e9p \u0111o n\u00e0y r\u1ea5t quan tr\u1ecdng.<\/p>\n<p>Ti\u1ebfp theo, h\u00e3y ngh\u0129 v\u1ec1 m\u1eb7t c\u1eaft c\u1ee7a b\u00e8, \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi nh\u1eefng th\u1ee9 nh\u01b0 tr\u1ecdng l\u01b0\u1ee3ng m\u00e0 h\u1ecd ph\u1ea3i h\u1ed7 tr\u1ee3 v\u00e0 s\u00e2n c\u1ee7a m\u00e1i nh\u00e0. Gi\u00e0n g\u1ed7, th\u00e9p v\u00e0 thi\u1ebft k\u1ebf l\u00e0 v\u1eadt li\u1ec7u ph\u1ed5 bi\u1ebfn cho b\u00e8; M\u1ed7i ng\u01b0\u1eddi c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i ri\u00eang bi\u1ec7t v\u00e0 c\u00e1c y\u00eau c\u1ea7u c\u1ea5u tr\u00fac. S\u1ee9c m\u1ea1nh v\u00e0 tu\u1ed5i th\u1ecd c\u1ee7a m\u00e1i nh\u00e0 c\u1ee7a b\u1ea1n b\u1ecb \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp b\u1edfi v\u1eadt li\u1ec7u v\u00e0 m\u1eb7t c\u1eaft ngang m\u00e0 b\u1ea1n ch\u1ecdn.<\/p>\n<p>\u0110i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i hi\u1ec3u t\u1ea3i tr\u1ecdng tr\u00ean b\u00e8 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ef1 \u0111\u00fang \u0111\u1eafn v\u1ec1 c\u1ea5u tr\u00fac c\u1ee7a m\u00e1i nh\u00e0 c\u1ee7a b\u1ea1n. T\u1ed5ng t\u1ea3i m\u00e0 c\u00e1c b\u00e8 ph\u1ea3i ch\u1ecbu ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1, bao g\u1ed3m c\u1ea3 kh\u1ea3 n\u0103ng ch\u1ed1ng gi\u00f3, t\u1ea3i tuy\u1ebft v\u00e0 lo\u1ea1i v\u1eadt li\u1ec7u l\u1ee3p. \u0110\u1ec3 \u0111\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 v\u00e0 an to\u00e0n, t\u00ednh to\u00e1n c\u00f4ng su\u1ea5t ch\u1ecbu t\u1ea3i ph\u1ea3i lu\u00f4n lu\u00f4n t\u00ednh \u0111\u1ebfn c\u00e1c m\u00e3 x\u00e2y d\u1ef1ng c\u1ee5c b\u1ed9.<\/p>\n<p>T\u00f3m l\u1ea1i, t\u00ednh to\u00e1n c\u1ee7a Rafter \u0111\u00f2i h\u1ecfi c\u00e1c ph\u00e9p \u0111o chi\u1ec1u d\u00e0i ch\u00ednh x\u00e1c, l\u1ef1a ch\u1ecdn m\u1eb7t c\u1eaft c\u1ea9n th\u1eadn d\u1ef1a tr\u00ean c\u00e1c y\u00eau c\u1ea7u v\u1ec1 v\u1eadt li\u1ec7u v\u00e0 t\u1ea3i v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh an to\u00e0n. B\u1ea1n c\u00f3 th\u1ec3 thi\u1ebft k\u1ebf v\u00e0 x\u00e2y d\u1ef1ng m\u1ed9t m\u00e1i nh\u00e0 kh\u00f4ng ch\u1ec9 th\u1ef1c t\u1ebf m\u00e0 c\u00f2n ch\u1ed1ng l\u1ea1i c\u00e1c \u0111i\u1ec1u ki\u1ec7n th\u1eddi ti\u1ebft thay \u0111\u1ed5i b\u1eb1ng c\u00e1ch xem x\u00e9t c\u00e1c y\u1ebfu t\u1ed1 n\u00e0y.<\/p>\n<h2>Video v\u1ec1 ch\u1ee7 \u0111\u1ec1<\/h2>\n<h3>V\u1ed7 b\u00e8 d\u1ecdc theo chi\u1ec1u d\u00e0i, t\u00ednh to\u00e1n chi\u1ec1u d\u00e0i v\u00e0 t\u1ea3i tr\u1ecdng, d\u1ef1 \u00e1n l\u1ee3p, x\u00e2y d\u1ef1ng m\u00e1i nh\u00e0 c\u1ee7a ng\u00f4i nh\u00e0<\/h3>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/fSbPg8a-OSw\" frameborder=\"0\" allow=\"autoplay; encrypted-media\" allowfullscreen><\/iframe><\/p>\n<h3>T\u00ednh to\u00e1n b\u00e8 tr\u00ean m\u00e1i \u0111\u1ea7u h\u1ed3i<\/h3>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/xQprVndj26Y\" frameborder=\"0\" allow=\"autoplay; encrypted-media\" allowfullscreen><\/iframe><\/p>\n<h3>T\u00ednh to\u00e1n c\u00e1c y\u1ebfu t\u1ed1 c\u1ee7a m\u00e1i l\u1edbp<\/h3>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/c5ey6IjHk30\" frameborder=\"0\" allow=\"autoplay; encrypted-media\" allowfullscreen><\/iframe><\/p>\n<h3>T\u00ednh to\u00e1n c\u1ee7a b\u00e8<\/h3>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/gNSFnfhK2vE\" frameborder=\"0\" allow=\"autoplay; encrypted-media\" allowfullscreen><\/iframe><\/p>\n<h3>T\u00ednh to\u00e1n c\u00e1c b\u00e8 c\u1ee7a ph\u1ea7n v\u00e0 b\u01b0\u1edbc (t\u00ednh to\u00e1n k\u00edch th\u01b0\u1edbc c\u1ee7a b\u00e8 v\u00e0 d\u1ea7m b\u1eb1ng ch\u00ednh tay c\u1ee7a b\u1ea1n,)<\/h3>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/eT_0pw-4UK8\" frameborder=\"0\" allow=\"autoplay; encrypted-media\" allowfullscreen><\/iframe><\/p>\n<h3>C\u00e1ch t\u00ednh b\u01b0\u1edbc gi\u1eefa c\u00e1c b\u00e8, kho\u1ea3ng c\u00e1ch c\u1ee7a nh\u1eefng chi\u1ebfc b\u00e8 d\u01b0\u1edbi s\u1ef1 c\u00e1ch nhi\u1ec7t c\u1ee7a m\u1ed9t m\u00e1i nh\u00e0 \u0111\u1ea7u h\u1ed3i<\/h3>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/9Z9yHS6sKCc\" frameborder=\"0\" allow=\"autoplay; encrypted-media\" allowfullscreen><\/iframe><\/p>\n<h3>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00ecm chi\u1ec1u cao c\u1ee7a m\u00e1i nh\u00e0 v\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a b\u00e8 d\u1ecdc theo g\u00f3c nghi\u00eang<\/h3>\n<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/cxyyl33-azA\" frameborder=\"0\" allow=\"autoplay; encrypted-media\" allowfullscreen><\/iframe><\/p>\n","protected":false},"excerpt":{"rendered":"<p>X\u00e1c \u0111\u1ecbnh b\u00e8 l\u00e0 m\u1ed9t b\u01b0\u1edbc quan tr\u1ecdng trong x\u00e2y d\u1ef1ng m\u00e1i nh\u00e0. C\u1ea5u tr\u00fac m\u00e1i nh\u00e0 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 b\u1edfi d\u1ea7m Rafter, l\u00e0 nh\u1eefng ch\u00f9m g\u00f3c h\u01b0\u1edbng chuy\u1ec3n tr\u1ecdng l\u01b0\u1ee3ng sang c\u00e1c b\u1ee9c t\u01b0\u1eddng. \u0110\u1ec3 m\u00e1i nh\u00e0 \u1ed5n \u0111\u1ecbnh v\u00e0 k\u00e9o d\u00e0i, chi\u1ec1u d\u00e0i, m\u1eb7t c\u1eaft v\u00e0 t\u1ea3i tr\u00ean b\u00e8 ph\u1ea3i \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh. [&hellip;]<\/p>\n","protected":false},"author":53,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22],"tags":[],"class_list":["post-2498","post","type-post","status-publish","format-standard","","category-roofs"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>C\u00e1ch t\u00ednh to\u00e1n b\u00e8 cho m\u00e1i nh\u00e0: T\u00ednh to\u00e1n \u0111\u1ed9 d\u00e0i, g\u00f3c, ph\u1ea7n, t\u1ea3i<\/title>\n<meta name=\"description\" content=\"T\u00ecm hi\u1ec3u c\u00e1ch t\u00ednh to\u00e1n b\u00e8 tr\u00ean m\u00e1i nh\u00e0 m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3: X\u00e1c \u0111\u1ecbnh chi\u1ec1u d\u00e0i, m\u1eb7t c\u1eaft ngang v\u00e0 x\u1eed l\u00fd c\u00e1c c\u00e2n nh\u1eafc v\u1ec1 t\u1ea3i tr\u1ecdng c\u1ee7a ch\u00fang. 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