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Pe re nc a na a n Struktur Ba ng una n Se ko la ha n 2 La nta i
BAB 3 Perencanaan Atap
Panjang gg’ = g’m = 1,406 m
Panjang ii’ = i’k = 0,468 m
• Luas bb’rqc’c
= ½ bb’ + cc’ 7-8 + ½ b’r + c’q 7-8 = ½ 2,048 + 1,537 0,9 + ½ 3,787 + 3,314 0,9
= 4,809
m
2
• Luas cc’qoe’e
= ½ cc’ + ee’ 5-7 + ½ c’q + e’o 5-7 = ½ 1,537+0,515 2 .0,9 + ½ 3,314 +2,3672 .0,9
= 6,960
m
2
• Luas ee’omg’gff’ = ½ 4-5 . ee’ + ½ e’o + g’m 3-5 + ½ ff’ + gg’ 3-5
= ½×0,9×0,515 + ½ 2,367+1,411,8 + ½1,89+1,511,8 =
6,520 m
2
• Luas gg’mki’i
= ½ gg’ + ii’ 1-3 × 2 = ½ 1,41+0,471 2 . 0,9 × 2
= 3,386
m
2
• Luas jii’k = ½ × ii’ × j1 × 2
= ½ × 0,471 × 0,9 × 2 = 0,424 m
2
3.3.3. Perhitungan Pembebanan Jurai
Data-data pembebanan : Berat gording
= 29,4 kgm Berat penutup atap
= 50 kgm
2
Berat plafon dan penggantung = 18 kgm
2
Berat profil kuda-kuda = 15 kgm
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Pe re nc a na a n Struktur Ba ng una n Se ko la ha n 2 La nta i
BAB 3 Perencanaan Atap
1 2
3 4
15 13
12 11
10 9
5 6
7 8
14 P1
P2 P3
P4 P5
P9 P8
P7 P6
Gambar 3.8. Pembebanan jurai akibat beban mati a. Beban Mati
1 Beban P1
a Beban Gording
= berat profil gording × panjang gording bb’r = 29,4 × 2,048+3,787 = 165,11 kg
b Beban Atap
= luasan aa’sqc’c × berat atap = 10,998 × 50 = 549,9 kg
c Beban Plafon
= luasan bb’rqc’c’ × berat plafon = 4,809 × 18 = 73,602 kg
d Beban Kuda-kuda
= ½ × btg 1 + 5 × berat profil kuda-kuda = ½ × 2,652 + 2,864 × 25
= 68,95 kg e
Beban Plat Sambung = 30 × beban kuda-kuda = 30 × 68,95 = 20,685 kg
f Beban Bracing
= 10 × beban kuda-kuda = 10 × 68,95 = 6,895 kg
2 Beban P2
a Beban Gording
= berat profil gording × panjang gording dd’p = 29,4 × 1,022+2,841 = 110,22 kg
b Beban Atap
= luasan cc’qoe’e × berat atap = 7,426 × 50 = 371,3 kg
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Pe re nc a na a n Struktur Ba ng una n Se ko la ha n 2 La nta i
BAB 3 Perencanaan Atap
c Beban Kuda-kuda
= ½ × btg 5 + 9 + 10 + 6 × berat profil kuda-kuda = ½ × 2,864 + 1,083 + 2,864 + 2,864 × 25
= 120,937 kg d
Beban Plat Sambung = 30 × beban kuda-kuda = 30 × 120,937 = 36,281 kg
e Beban Bracing
= 10 × beban kuda-kuda = 10 × 120,937 = 12,094 kg
3 Beban P3
a Beban Gording
= berat profil gording × panjang gording ff’n = 29,4 × 1,894+1,894 = 110,25 kg
b Beban Atap
= luasan ee’omg’gff’ × berat atap = 6,862 × 50 = 343,1 kg
c Beban Kuda-kuda
= ½ × btg 6 + 11 + 12 + 7 × berat profil kuda-kuda = ½ × 2,864 + 2,165 + 3,423 + 2,864 × 25
= 146,963 kg d
Beban Plat Sambung = 30 × beban kuda-kuda = 30 × 146,963 = 47,089 kg
e Beban Bracing
= 10 × beban kuda-kuda = 10 × 146,963 = 15,696 kg
4 Beban P4
a Beban Gording
= berat profil gording × panjang gording hh’l = 29,4 × 0,937+0,937 = 55,096 kg
b Beban Atap
= luasan gg’mki’i × berat atap = 3,525 × 50 = 176,25 kg
c Beban Kuda-kuda
= ½ × btg 7 + 13 + 15 + 8 × berat profil kuda-kuda = ½ × 2,864 + 3,226 + 4,193 + 2,864 × 25
= 164,338 kg d
Beban Plat Sambung = 30 × beban kuda-kuda = 30 × 164,338 = 49,301 kg
e Beban Bracing
= 10 × beban kuda-kuda = 10 × 164,338 = 16,434 kg
commit to user
Tugas Akhir
Pe re nc a na a n Struktur Ba ng una n Se ko la ha n 2 La nta i
BAB 3 Perencanaan Atap
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