Luas gica Luas moig Luas pmo Luas giom Luas gifd Luas jlig Beban Mati

commit to user Perencanaan Struktur Butik 2 Lantai BAB 3 Rencana Atap

3.3.2. Perhitungan luasan Setengah Kuda-kuda

G KK KK N JL SK JL JL C JL a b c f e d g h i j k l p C m n o Gambar 3.3 Luasan Setengah Kuda-kuda Panjang pe = 2 x 2,569 = 5,138 m Panjang eb = 1,155 m Panjang pb = pe + eb = 6,293 m Panjang df = 4,45 m Panjang jl = 2,225 m Panjang mo = 1,1125 m Panjang gi = 3,3375 m Panjang ac = 5,45 m Panjang hb = ½ . 2,569 + eb = 2,44 m Panjang nh = 2,569 m Panjang pn = ½ . 2,569 = 1,285 m

a. Luas gica

= ½ hb. gi + ac = ½ . 2,44 x 3,3375 + 5,45 = 10,72 m 2 commit to user Perencanaan Struktur Butik 2 Lantai BAB 3 Rencana Atap

b.Luas moig

= ½ nh. mo + gi = ½ . 2,569 x 1,1125 + 3,3375 = 5,72 m 2

c. Luas pmo

= ½ . mo x pn = ½ . 1,1125 x 1,285 = 0,72 m 2 G KK KK N JL SK JL JL D JL a b c f e d g h i j k l p D m n o Gambar 3.4. Luasan Plafon Panjang pe = 2 x 2,225 = 4,45 m Panjang eb = 1 m Panjang pb = pe + eb = 5,45 m Panjang df = 4,45 m Panjang jl = 2,225 m Panjang mo = 1,1125 m Panjang gi = 3,3375 m Panjang ac = 5,45 m Panjang hb = 1,1125 m Panjang hk = 1,1125 m Panjang pn = 1,1125 m commit to user Perencanaan Struktur Butik 2 Lantai BAB 3 Rencana Atap

a. Luas giom

= ½ . nh. mo + gi = ½ . 1 x 1,1125 + 3,3375 = 2,225 m 2

b.Luas gifd

= ½ he. gi + df = ½ . 1,1125 x 3,3375 + 4,45 = 4,33 m 2

c. Luas jlig

= ½ . hk x jl + gi = ½ .1,1125 x 2,225 + 3,3375 = 3,10 m 2

d.Luas pmo

= ½.. mo x pn = ½ . 1,1125 x 1,1125 = 0,62 m 2

3.3.3. Perhitungan Pembebanan Setengah Kuda-kuda

Data-data pembebanan : Berat gording = 4,337 kgm Jarak antar kuda-kuda = 2,25 m Berat penutup atap = 50 kgm 2 Berat profil = 25 kgm Gambar 3.5.Pembebanan Setengah Kuda-kuda akibat beban mati Ket : R1 dan R2 merupakan reaksi join 1 2 5 7 6 3 4 P1 P2 P3 P4 P5 R1 R2 commit to user Perencanaan Struktur Butik 2 Lantai BAB 3 Rencana Atap

1. Perhitungan Beban

a. Beban Mati

1 Beban P 1 a Beban gording = Berat profil gording x Panjang Gording = 4,337 x 3,32 = 14,398 kg b Beban atap = Luasan x Berat atap = 10,72 x 50 = 536 kg c Beban kuda-kuda = ½ x Btg 1 + 6 x berat profil kuda kuda = ½ x 2,569 + 2,225 x 25 = 59,925 kg d Beban plat sambung = 30 x beban kuda-kuda = 30 x 59,925 = 17,98 kg e Beban bracing = 10 x beban kuda-kuda = 10 x 59,925 = 6,0 kg f Beban plafon = Luasan x berat plafon = 4,33 x 18 = 77,97 kg 2 Beban P 2 a Beban gording = Berat profil gording x Panjang Gording = 4,337 x 2,225 = 9,65 kg b Beban atap = Luasan x berat atap = 5,72 x 50 = 286 kg c Beban kuda-kuda = ½ x Btg 1 + 3 + 4 +2 x berat profil kuda kuda = ½ x 2,569 + 1,285 + 2,569 + 2,569 x 25 = 112,4 kg d Beban plat sambung = 30 x beban kuda-kuda = 30 x 112,4 = 33,72 kg e Beban bracing = 10 x beban kuda-kuda = 10 x 112,4 = 11,24 kg 3 Beban P 3 a Beban atap = Luasan x berat atap = 0,72 x 50 = 36 kg commit to user Perencanaan Struktur Butik 2 Lantai BAB 3 Rencana Atap b Beban kuda-kuda = ½ x Btg 2 + 4 + 5 x berat profil kuda kuda = ½ x 2,569 + 2,569 + 2,569 x 25 = 96,3375 kg c Beban plat sambung = 30 x beban kuda-kuda = 30 x 96,3375 = 28,90 kg d Beban bracing = 10 x beban kuda-kuda = 10 x 96,3375 = 9,64 kg 4 Beban P 4 a Beban kuda-kuda = ½ x Btg6 + 3 + 7 x berat profil kuda kuda = ½ x 2,225 + 1,285 + 2,225 x 25 = 71,69 kg b Beban bracing = 10 x beban kuda-kuda = 10 x 71,69 = 7,17 kg c Beban plafon = Luasan x berat plafon = 2,225 x 18 = 40,05 kg d Beban plat sambung = 30 x beban kuda-kuda = 30 x 71,69 = 21,51 kg 5 Beban P 5 a Beban kuda-kuda = ½ x Btg 7 + 4 + 5 x berat profil kuda kuda = ½ x 2,225 + 2,569 + 2,569 x 25 = 92,04 kg b Beban bracing = 10 x beban kuda-kuda = 10 x 92,04 = 9,21 kg c Beban plafon = Luasan x berat plafon = 0,62 x 18 = 11,16 kg d Beban plat sambung = 30 x beban kuda-kuda = 30 x 92,04 = 27,61 kg commit to user Perencanaan Struktur Butik 2 Lantai BAB 3 Rencana Atap Tabel 3.3 Rekapitulasi Pembebanan Setengah Kuda-kuda Beban Beban Atap kg Beban gording kg Beban Kuda - kuda kg Beban Bracing kg Beban Plat Penyambug kg Beban Plafon kg Jumlah Beban kg Input SAP 2000 kg P 1 536 14,398 59,925 6,0 17,98 77,97 712,27 750 P 2 286 9,65 112,40 11,24 33,72 --- 453,01 455 P 3 36 --- 96,3375 9,64 28,90 --- 170,88 175 P 4 --- --- 71,69 7,17 21,51 40,05 140,42 145 P 5 --- --- 92,04 9,21 27,61 11,16 140,02 140

b. Beban Hidup