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Tugas akhir Perencanaan Struktur Gedung Swalayan 2 Lantai RAB
BAB 3 Perencanaan Atap
Panjang
aa” = bb”= dd”= ff”= hh”= jj”= ll”= nn
a.Luas plafond ll”n”n = ln × nn”
= 2,04165 × 5 = 10,20825 m
2
b. Luas plafond jj”l”l
= jl × ll” = 2,0833 × 5 = 10,4165 m
2
c. Luas plafond hh”j”j
= hj × jj” = 2,0833 × 5 = 10,4165 m
2
d. Luas plafond ff”h”h = fh × hh”
= 2,0833 × 5 = 10,4165 m
2
e. Luas plafond dd”f”f
= df × ff” = 2,0833 × 5 = 10,4165 m
2
f. Luas plafond bb”d”d = bd × dd”
= 2,0833 × 5 = 10,4165 m
2
g. Luas plafond aa”b”b = ab × bb”
= 1,20825 × 5 = 5,20825 m
2
3.6.3. Perhitungan Pembebanan Kuda-kuda Utama
Data-data pembebanan : Berat gording
= 12,3 kgm
2
Jarak antar kuda-kuda utama = 5 m Berat penutup atap
= 50 kgm
2
Berat profil = 28,4 kgm
Berat penggantung dan plafon = 18 kgm
2
Beban hujan = 40-
0,8 γ = 14,4 kgm
2
Pembebanan kuda-kuda utama akibat beban mati seperti terlihat pada Gambar 3.23.
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Tugas akhir Perencanaan Struktur Gedung Swalayan 2 Lantai RAB
BAB 3 Perencanaan Atap
Gambar 3.23. Pembebanan Kuda- kuda Utama akibat Beban Mati
a. Beban Mati
Beban P1 = P13
Beban gording =
Berat profil gording × Panjang Gording
mm”
= 12,3 × 5 = 61,5 kg Beban atap
= Luas Atap ll”n”n × Berat atap = 12,0255 × 50 = 371,9 kg
Beban plafon =
Luas Plafon × berat plafon
ll”n”n
= 10,20825 × 18 = 183,7485 kg Beban kuda-kuda
= ½ × Btg 1 + 13 × berat profil kuda kuda = ½ × 2,15464 + 2,4542 × 28,4
= 65,45 kg Beban plat sambung = 30 × beban kuda-kuda
= 30 × 65,45 = 19,635 kg Beban bracing
= 10 × beban kuda-kuda = 10 × 65,45 = 6,545 kg
Beban P2 = P12
commit to user 101
Tugas akhir Perencanaan Struktur Gedung Swalayan 2 Lantai RAB
BAB 3 Perencanaan Atap
Beban gording =
Berat profil gording × Panjang Gording kk
” = 12,3 × 5 = 61,5 kg
Beban atap = Luas Atap
jj”l”l × Berat atap
= 12,271 × 50 = 613,55 kg Beban kuda-kuda
= ½ × Btg 13+14+25+26 × berat profil kuda kuda = ½ × 2,4542+2.,4542+0,7406+2,0914 × 28,4
= 109,91 kg Beban plat sambung = 30 × beban kuda-kuda
= 30 × 109,91 = 32,97 kg Beban bracing
= 10 × beban kuda-kuda = 10 × 109,91 = 10,991 kg
Beban P3 = P11
Beban gording =
Berat profil gording × Panjang Gording
ii”
= 12,3 × 5 = 61,5 kg Beban atap
= Luas
hh”j”j × Berat atap
= 12,271 × 50 = 613,55 kg Beban kuda-kuda
= ½ × Btg 14+15+27+28 × berat profil kuda kuda = ½ × 2,4542+2,4542+1,4811+2,2793 × 28,4
= 123,10 kg Beban plat sambung = 30 × beban kuda-kuda
= 30 × 123,10 = 36,93 kg Beban bracing
= 10 × beban kuda-kuda = 10 × 123,10 = 12,31 kg
Beban P4 = P10
Beban gording =
Berat profil gording × Panjang Gording
gg”
= 12,3 × 5 = 61,5 kg Beban atap
= Luas
ff”h”h × Berat atap
= 12.271 × 50 = 613,55 kg Beban kuda-kuda
= ½ × Btg 15+16+29+30 × berat profil kuda kuda = ½ × 2,4542+2,4542+2,2217+2,6670 × 28,4
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Tugas akhir Perencanaan Struktur Gedung Swalayan 2 Lantai RAB
BAB 3 Perencanaan Atap
= 139,12 kg Beban plat sambung = 30 × beban kuda-kuda
= 30 × 139,12 = 41,736 kg Beban bracing
= 10 × beban kuda-kuda = 10 × 139,12 = 13,912 kg
Beban P5 = P9
Beban gording =
Berat profil gording × Panjang Gording
ee”
= 12,3 × 5 = 61,5 kg Beban atap
= Luas Atap
dd”f”f × Berat atap
= 12.271 × 50 = 613,55 kg Beban kuda-kuda
= ½ × Btg 16+17+31+32 × berat profil kuda kuda = ½ × 2,4542+2,4542+2,9623+3,1824 × 28,4
= 156,95 kg Beban plat sambung = 30 × beban kuda-kuda
= 30 × 156,95 = 47,09 kg Beban bracing
= 10 × beban kuda-kuda = 10 × 156,95 = 15,695 kg
Beban P6 = P8
Beban gording =
Berat profil gording × Panjang Gording
cc”
= 12,3 × 5 = 61,5 kg Beban atap
= Luas Atap
bb”d”d × Berat atap
= 12.271 × 50 = 613,55 kg Beban kuda-kuda
= ½ × Btg 17+18+33 × berat profil kuda kuda = ½ × 2,4542+2,4542+3,7028 × 28,4
= 122,28 kg Beban plat sambung = 30 × beban kuda-kuda
= 30 × 122,28 = 36,68 kg Beban bracing
= 10 × beban kuda-kuda = 10 × 122,28 = 12,228 kg
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Tugas akhir Perencanaan Struktur Gedung Swalayan 2 Lantai RAB
BAB 3 Perencanaan Atap
Beban P7
Beban atap = Luas Atap
aa”b”b × Berat atap
= 6,1355× 50 = 306,775 kg Beban kuda-kuda
= ½×Btg18+19+34+35+36×berat profil kuda kuda = ½ × 2,4542+2,4542+5,4167+5+5,4167 × 28,4
= 223,53 kg Beban plat sambung = 30 × beban kuda-kuda
= 30 × 223,53 = 67,06 kg Beban bracing
= 10 × beban kuda-kuda = 10 × 223,53 = 22,353 kg
Beban P14 = P24
Beban plafon = Luas Atap
jj”l”l × Berat plafon
= 10,4165 × 18 = 187,497 kg Beban kuda-kuda
= ½ × Btg 1+2+25 × berat profil kuda kuda = ½ × 2,1564+2,1564+0,7406 × 28,4
= 71,76 kg Beban plat sambung = 30 × beban kuda-kuda
= 30 × 71,76 = 21,528 kg Beban bracing
= 10 × beban kuda-kuda = 10 × 71,76 = 7,176 kg
Beban P15 = P23
Beban plafon = Luas Atap
hh”j”j × Berat plafon
= 10,4165 × 18 = 187,497 kg Beban kuda-kuda
= ½ × Btg 2+3+26+27 × berat profil kuda kuda = ½ × 2,1564+2,1564+2,0914+1,4811 × 28,4
= 111,97 kg Beban plat sambung = 30 × beban kuda-kuda
= 30 × 111,97= 33,59 kg Beban bracing
= 10 × beban kuda-kuda = 10 × 111,97 = 11,197 kg
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Tugas akhir Perencanaan Struktur Gedung Swalayan 2 Lantai RAB
BAB 3 Perencanaan Atap
Beban P16 = P22
Beban plafon = Luas Atap
ff”h”h × Berat plafon
= 10,4165 × 18 = 187,497 kg Beban kuda-kuda
= ½ × Btg 3+4+28+29 × berat profil kuda kuda = ½ × 2,1564+2,1564+2,2793+2,2217 × 28,4
= 125,16 kg Beban plat sambung = 30 × beban kuda-kuda
= 30 × 125,16 = 37,55 kg Beban bracing
= 10 × beban kuda-kuda = 10 × 125,16 = 12,516 kg
Beban P17 = P21
Beban plafon = Luas Atap
dd”f”f × Berat plafon
= 10,4165 × 18 = 187,497 kg Beban kuda-kuda
= ½ × Btg 4+5+30+31 × berat profil kuda kuda = ½ × 2,1564+2,1564+2,6670+2,9623 × 28,4
= 141,18 kg Beban plat sambung = 30 × beban kuda-kuda
= 30 × 141,18 = 42,35 kg Beban bracing
= 10 × beban kuda-kuda = 10 × 141,18 = 14,118 kg
Beban P18 = P20
Beban plafon = Luas Atap bb”d”d × Berat plafon
= 10,4165 × 18 = 187,497 kg Beban kuda-kuda
= ½ × Btg 5+6+32+33+34× berat profil kuda kuda = ½ × 2,1564+2,0833+3,1824+3,7028 × 28,4
= 157,97 kg Beban plat sambung = 30 × beban kuda-kuda
= 30 × 157,97 = 47,39 kg Beban bracing
= 10 × beban kuda-kuda = 10 × 157,97 = 15,797 kg
commit to user 105
Tugas akhir Perencanaan Struktur Gedung Swalayan 2 Lantai RAB
BAB 3 Perencanaan Atap
Beban P19
Beban plafon = Luas Atap
aa”b”b × Berat plafon
= 5,20825× 18 = 93,7485 kg Beban kuda-kuda
= ½ × Btg 6+7+35× berat profil kuda kuda = ½ × 2,0833+2,0833+5 × 28,4
= 130,17 kg Beban plat sambung = 30 × beban kuda-kuda
= 30 × 130,17 = 39,05 kg Beban bracing
= 10 × beban kuda-kuda = 10 × 130,17 = 13,017 kg
Rekapitulasi beban mati kuda-kuda utama seperti terlihat dalam Tabel 3.18.
Tabel 3.18. Rekapitulasi Beban Mati Kuda-kuda Utama
Beban Beban
Atap kg
Beban gording
kg Beban
Kuda - kuda
kg Beban
Bracing kg
Beban Plat Penyambung
kg Beban
Plafon kg
Jumlah Beban
kg Input
SAP kg
P1=P13 601,275
61,5 65,45
6,545 19,635
183,7485 938,15 939
P2=P12 613,55
61,5 109,91
10,991 32,97
- 828,921
829 P3=P11
613,55 61,5
123,10 12,31
36,93 -
847,39 848
P4=P10 613,55
61,5 139,12
13,912 41,736
- 869,818
870 P5=P9
613,55 61,5
156,95 15,695
47,09 -
894,785 895
P6=P8 613,55
61,5 122,28
12,228 36,68
- 846,238
847 P7
306,775 -
223,53 22,353
67,06 -
619,718 620
P14=P24 -
- 71,76
7,176 21,528
187,497 287,961 288
P15=P23 -
- 111,97
11,197 33,59
187,497 344,254 345
P16=P22 -
- 125,16
12,516 37,55
187,497 362,723 363
P17=P21 -
- 141,18
14,118 42,35
187,497 385,145 386
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Tugas akhir Perencanaan Struktur Gedung Swalayan 2 Lantai RAB
BAB 3 Perencanaan Atap
P18=P20 -
- 157,97
15,797 47,39
187,497 408,654 409
P19 -
- 130,17
13,017 39,05
93,7485 275,986 276
b. Beban Hidup
