Luas plafond hh”f”f Luas plafond ff”dd” Luas plafond dd”b”b = Beban Mati Beban P1 = P13

commit to user 78 Tugas akhir Perencanaan Struktur Gedung Swalayan 2 Lantai RAB BAB 3 Perencanaan Atap Panjang ff”=ff’+f’f”=3,125+2,6023=5,7273 m Panjang hh”=hh’+h’h”=3,125+3,675=6,80 m

a. Luas plafond hh”f”f

= 2 ff hh × f’h’ = 2 7273 , 5 80 , 6 × 2,04165 = 12,7882 m 2

b. Luas plafond ff”dd”

= 2 dd ff × d’f’ = 2 1677 , 4 7273 , 5 × 2,0833 = 10,3071 m 2

c. Luas plafond dd”b”b =

2 dd bb × b’d’ = 2 6464 , 3 1677 , 4 × 2,0833 = 8,1396 m 2

d. Luas plafond bb”a”a =

2 aa bb × a’b’ = 2 125 , 3 6464 , 3 × 1,04165 = 3,5267 m 2

3.5.3. Perhitungan Pembebanan Kuda-kuda Trapesium

Data-data pembebanan : Berat gording = 12,3 kgm Berat penutup atap = 50 kgm 2 Berat profil = 11,9 kgm Berat penggantung dan plafon = 18 kgm 2 commit to user 79 Tugas akhir Perencanaan Struktur Gedung Swalayan 2 Lantai RAB BAB 3 Perencanaan Atap Pembebanan kuda-kuda trapesium akibat beban mati seperti terlihat pada Gambar 3.18. Gambar 3.18. Pembebanan Kuda-kuda Trapesium akibat Beban Mati

a. Beban Mati Beban P1 = P13

Beban gording = Berat profil gording × Panjang Gording = 12,3 × 6,25 = 76,875 kg Beban atap = Luas atap hh”f”f × Berat atap = 15,0647 × 50 = 753,235 kg Beban plafon = Luas plafon hh”f”f × berat plafon = 12,7882 × 18 = 230,1876 kg Beban kuda-kuda = ½ × Btg 1 + 13 × berat profil kuda kuda = ½ × 2,1564 + 2,4542 × 11,9 = 27,43 kg Beban plat sambung = 30 × beban kuda-kuda = 30 × 27,43 = 8,23 kg Beban bracing = 10 × beban kuda-kuda = 10 × 27,43 = 2,743 kg Beban P2 = P12 Beban gording = Berat profil gording × Panjang Gording commit to user 80 Tugas akhir Perencanaan Struktur Gedung Swalayan 2 Lantai RAB BAB 3 Perencanaan Atap = 12,3 × 5,2127 = 64,1162 kg Beban atap = Luas atap ff”d”d × Berat atap = 12,1422 × 50 = 607,11 kg Beban kuda-kuda = ½ × Btg 13+14+25+26 × berat profil kuda kuda = ½ × 2,4542+2,4542+0,7406+20914 × 11,9 = 46,055 kg Beban plat sambung = 30 × beban kuda-kuda = 30 × 46,055 = 13,82 kg Beban bracing = 10 × beban kuda-kuda = 10 × 46,055 = 4,606 kg Beban P3 = P11 Beban gording = Berat profil gording × Panjang Gording = 12,3 × 4,1677 = 51,2627 kg Beban atap = Luas atap dd”b”b × Berat atap = 9,5887 × 50 = 479,435 kg Beban kuda-kuda = ½ × Btg 14+15+27+28 × berat profil kuda kuda = ½ × 2,4542+2,4542+1,4811+2,2793 × 11,9 = 51,58 kg Beban plat sambung = 30 × beban kuda-kuda = 30 × 51,58 = 15,47 kg Beban bracing = 10 × beban kuda-kuda = 10 × 51,58 = 5,158 kg Beban P4 = P10 Beban gording = Berat profil gording × Panjang Gording = 12,3 × 3,125 = 38,4375 kg Beban atap = Luas atap bb”a”a × Berat atap = 4,1546 × 50 = 207,73 kg Beban kuda-kuda = ½ × Btg 15+16+29 × berat profil kuda kuda = ½ × 2,4542+2,0833+2,2217 × 11,9 commit to user 81 Tugas akhir Perencanaan Struktur Gedung Swalayan 2 Lantai RAB BAB 3 Perencanaan Atap = 40,22 kg Beban plat sambung = 30 × beban kuda-kuda = 30 × 40,22 = 12,065 kg Beban bracing = 10 × beban kuda-kuda = 10 × 40,22 = 4,022 kg Beban P5 = P9 Beban kuda-kuda = ½ × Btg 16+17+30 × berat profil kuda kuda = ½ × 2,0833+2,0833+2,2217 × 11,9 = 38,01 kg Beban plat sambung = 30 × beban kuda-kuda = 30 × 38,01 = 11,40 kg Beban bracing = 10 × beban kuda-kuda = 10 × 38,01 = 3,801 kg Beban P6 = P8 Beban kuda-kuda = ½ × Btg17+18+31+32+33 × berat profil kuda kuda = ½ × 2,0833+2,0833+3,0457+2,2217+3,0457 × 11,9 = 74,25 kg Beban plat sambung = 30 × beban kuda-kuda = 30 × 74,25 = 22,28 kg Beban bracing = 10 × beban kuda-kuda = 10 × 74,25 = 7,425 kg Beban P7 Beban kuda-kuda = ½ × Btg18+19+34 × berat profil kuda kuda = ½ × 2,0833+2,0833+2,2217 × 11,9 = 38,01 kg Beban plat sambung = 30 × beban kuda-kuda = 30 × 38,01 = 11,40 kg Beban bracing = 10 × beban kuda-kuda = 10 × 38,01 = 3,8 kg commit to user 82 Tugas akhir Perencanaan Struktur Gedung Swalayan 2 Lantai RAB BAB 3 Perencanaan Atap Beban P14 = P24 Beban plafon = Luas plafon ff”d”d × berat plafon = 10,3071 x 18 = 185,5278 kg Beban kuda-kuda = ½ × Btg1+2+25 × berat profil kuda kuda = ½ × 2,1564+2,1564+0,7406 × 11,9 = 30,07 kg Beban plat sambung = 30 × beban kuda-kuda = 30 × 30,07 = 9,02 kg Beban bracing = 10 × beban kuda-kuda = 10 × 30,07 = 3,007 kg Beban P15 = P23 Beban plafon = Luas plafon dd”b”b × berat plafon = 8,1396 x 18 = 146,5128 kg Beban kuda-kuda = ½ × Btg2+3+26+27 × berat profil kuda kuda = ½ × 2,1564+2,1564+2,0914+1,4811 × 11,9 = 46,92 kg Beban plat sambung = 30 × beban kuda-kuda = 30 × 46,92 = 14,08 kg Beban bracing = 10 × beban kuda-kuda = 10 × 46,92 = 4,69 kg Beban P16 = P22 Beban plafon = Luasan plafon × berat plafon = 3,5267 x 18 = 63,4806 kg Beban kuda-kuda = ½ × Btg3+4+28+29 × berat profil kuda kuda = ½ × 2,1564+2,0933+2,2793+2,2217 × 11,9 = 52,007 kg Beban plat sambung = 30 × beban kuda-kuda commit to user 83 Tugas akhir Perencanaan Struktur Gedung Swalayan 2 Lantai RAB BAB 3 Perencanaan Atap = 30 × 52,007 = 15,602 kg Beban bracing = 10 × beban kuda-kuda = 10 × 52,007 = 5,2 kg Beban P17 = P21 Beban kuda-kuda = ½ × Btg 4+5+29+30+31 × berat profil kuda kuda = ½ × 2,0833+2,0833+3,0457+2,2217+3,0457 × 11,9 = 74,25 kg Beban plat sambung = 30 × beban kuda-kuda = 30 × 74,25 = 22,28 kg Beban bracing = 10 × beban kuda-kuda = 10 × 74,25 = 7,425 kg Beban P18 = P20 Beban kuda-kuda = ½ × Btg 5+6+32 × berat profil kuda kuda = ½ × 2,0833+2,0833+2,2217 × 11,9 = 38,01 kg Beban plat sambung = 30 × beban kuda-kuda = 30 × 38,01 = 11,403 kg Beban bracing = 10 × beban kuda-kuda = 10 × 38,01 = 3,801 kg Beban P19 Beban kuda-kuda = ½ × Btg 6+7+33+34+35 × berat profil kuda kuda =½×2,0833+2,0833+3,0457+2,2217+3,0457×11,9 = 74,25 kg Beban plat sambung = 30 × beban kuda-kuda = 30 × 74,25 = 22,28 kg Beban bracing = 10 × beban kuda-kuda = 10 × 74,25 = 7,425 kg Rekapitulasi pembebanan kuda-kuda trapesium tersaji dalam Tabel 3.13. commit to user 84 Tugas akhir Perencanaan Struktur Gedung Swalayan 2 Lantai RAB BAB 3 Perencanaan Atap Tabel 3.13. Rekapitulasi Pembebanan Kuda-kuda Trapesium 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 753,235 76,875 27,43 2,743 8,23 230,188 1098,7 1099 P2=P12 607,11 64,116 46,055 4,606 13,82 - 735,7 736 P3=P11 479,435 51,263 51,58 5,158 15,47 - 602,9 603 P4=P10 207,73 38,438 40,22 4,022 12,065 - 302,5 303 P5=P9 - - 38,01 3,801 11,40 - 53,211 54 P6=P8 - - 74,25 7,425 22,28 - 103,955 104 P7 - - 38,01 3,8 11,40 - 53,21 54 P14=P24 - - 30,07 3,007 9,02 185,528 227,6 228 P15=P23 - - 46,92 4,69 14,08 146,513 212,2 213 P16=P22 - - 52,007 5,2 15,60 63,481 16,29 17 P17=P21 - - 74,25 7,425 22,28 - 103,955 104 P18=P20 - - 38,01 3,801 11,403 - 53,214 54 P19 - - 74,25 7,425 22,28 - 103,955 104

b. Beban Hidup