• Document: PERENCANAAN GORDING, TREKSTANG, DAN IKATAN ANGIN A. PERENCANAAN GORDING. 1. Beban Mati a. Penutup Atap. 2. Beban Angin Koefisien Angin Hisap
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PERENCANAAN GORDING, TREKSTANG, DAN IKATAN ANGIN A. PERENCANAAN GORDING JARAK MIRING GORDING (R) = 476.1 mm α = 35 sin 35 = 0.573576436 keterangan : JARAK MENDATAR GORDING = 390.00 mm cos 35 = 0.819152044 R= 570 cm JARAK TEGAK GORDING (h) = 273.08 mm JAK(L) = 5700 mm Z= 430 cm S= 114 cm DICOBA PROFIL MC12x31 T= 53.75 cm Berat (Nominal) = 31 lb/ft = 45.768 kg/m 0.4576771654 N/mm Sx = 33.8 in³ = 553.883 mm³ Sy = 4.39 in³ = 71.939 mm³ Ix = 203 in⁴ = 8449.498 mm⁴ Iy = 11.3 in⁴ = 470.342 mm⁴ Mutu Baja = 34 Fu = 340 Mpa Fy = 210 Mpa 1. Beban Mati a. Penutup Atap W Seng = 10 kg/m² 0.0001 N/mm² W Penutup Atap x R = 0.048 N/mm Beban Sendiri gording = 0.458 N/mm qD = 0.505 N/mm qdy = qd x sin 35 = 0.290 N/mm qdx = qd x cos 35 = 0.414 N/mm 2. Beban Angin W Angin = 30 kg/m² 0.0003 N/mm² Koefisien Angin Tekan = 0.02 x α - 0.4 = 0.300 Koefisien Angin Hisap = -0.4 W Tekan = c Tekan x Wangin x h = 0.3 x 0.0003 x 273.08 = 0.025 N/mm W Hisap = c Hisap x Wangin x h = -0.4 x 0.0003 x 273.08 = -0.033 N/mm 3. Beban Hujan H = 0.0004 - 0.000008 x α ) R = 0.0004 - 0.000008 x 35 ) 476.10 = 0.057 N/mm Hx = H x Cos 35 = 0.057 x 0.8191520443 = 0.047 N/mm Hy = H x sin 35 = 0.057 x 0.5735764364 = 0.033 N/mm 4. Beban Hidup P = 100 kg 1000 N Px = P x Cos 35 Py = P x sin 35 = 1000 x 0.8191520443 = 1000 x 0.573576436 = 819.152044289 N = 573.576436351 N Bidang Momen L = 5700.00 mm L² = 32490000 mm² MDLx=D = 1/8.qdx.L² = 1/8 x 0.414 x 32490000 = 1680979.862 N.mm Mwtekan x=W = 1/8.Wtekan.L² = 1/8 x 0.025 x 32490000 = 99814.059 N.mm Mwhisap x = 1/8.Whisap.L² = 1/8 x -0.033 x 32490000 = -133085.412 N.mm 133085.

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