Kapasitas Tarik Sekrup Kapasitas tarik elemen pada bagian sambungan Batang tarik 6 Persyaratan jarak pemasangan sekrup

Kuat geser self-drilling screw no.14 tipe CSD = 0,618900 N = 11340 N ≥ 3638,135 N................OK Jumlah sekrup yang dibutuhkan a. Gaya dalam pada batang tekan 36 � � = � � �� � � � = 2663,95 3638,135 = 0,732 ≈ 2 ������ b. Gaya dalam pada batang tarik 7 � � = � � �� � � � = 28545,79 3638,135 = 7,846 ≈ 8 ������ Sambungan antara batang tekan 36 dan batang tarik 7 membutuhkan 8 buah sekrup no.14. tipe CSD

2. Kapasitas Tarik Sekrup

a. Pull Out � �� = 0.85 × � 2 × � � × � �2 N ou = 0,8516,35550 = 2968,625 N b. Pull Over � �� = 1.5 � 1 × � � × � �1 Universitas Sumatera Utara N ov = 1,5112550 = 9900 N Pull Out lebih menentukan sehingga N t = 2968,625 N ɸ = 0,5 ɸN t = 0,5 2968,625 N = 1484,313 N Kuat tarik desain sekrup disyaratkan sebesar 1,25 x 1484,313 = 1855,391 N

3. Kapasitas tarik elemen pada bagian sambungan Batang tarik 6

Nu = 28968,03 N tarik L = 1500 mm � � = �� � ������ � � ∗ � � = 28968,03 8 � 56023,914 = 0,065 � � = �1.0 − � � + 2.5� � × � � � � �� � × � � ≤ � � × � � � � = �1,0 − 0,065 + 2,5∗0,065∗6,35 25 �550 ∗ 164,65 ≤ 550 ∗ 164,65 N t = 0,976550156,65 ≤ 550156,65 N t = 84124,949 N ≤ 86157,5 N N t ≤ ɸ N t N t = 84124,949 N N t = 0,6584124,949 N N t = 54681,217 N ≥ Nu = 28968,03 N.....................OK Universitas Sumatera Utara Batang tarik 35 Nu = 4960,05 N tarik L = 2098,4 mm � � = �� � ������ � � ∗ � � = 4960,05 3 � 56023,914 = 0,03 � � = �1.0 − � � + 2.5� � × � � � � �� � × � � ≤ � � × � � � � = �1,0 − 0,03 + 2,5∗0,03∗6,35 25 �550 ∗ 156,65 ≤ 550 ∗ 156,65 N t = 0,989550156,65 ≤ 550156,65 N t = 85229,437 N ≤ 86157,5 N N t ≤ ɸ N t N t = 85229,437 N N t = 0,6585229,437 N N t = 54884,314 N ≥ Nu = 4960,05 N.....................OK

4. Persyaratan jarak pemasangan sekrup

a. Jarak antar sekrup center to center

Jarak antar pusat sekrup didesain seragam sebesar 20 mm 3d 19,05 mm OK

b. Jarak pusat sekrup dengan tepi elemen tranversal

Jarak pusat sekrup dengan tepi elemen didesain paling pendek adalah 12 mm 1,5d 9,525 mm Universitas Sumatera Utara Detail pemasangan sekrup pada joint 7 Gambar 4.9. Detail Pemasangan Sekrup pada Joint 7 Universitas Sumatera Utara Tabel 4.2. Desain Sambungan joint sambungan batang Pu t1 t2 t2 t1 df Vb tilting Vb1 Vb2 Vb desain 1,25 ɸVb Vs Vs Nu Vb n Vdesain sekrup N mm mm mm mm N N N N N N 1 1 dan 24 1 31991,26 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 8,793 10 24 34397,34 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 9,455 2 25 dan 2 1 31991,26 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 8,793 9 2 32224,92 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 8,858 25 122,39 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,034 3 26 dan 2 2 32224,92 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 8,858 9 26 2016,68 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,554 27 dan 3 27 1712,09 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,471 9 3 30319,89 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 8,334 4 28 dan 3 28 3879,56 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 1,066 9 3 30319,89 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 8,334 29 dan 4 29 3373,27 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,927 8 4 27367,7 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 7,522 5 30 dan 4 30 3844,78 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 1,057 8 4 27367,7 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 7,522 31 dan 5 31 2316,72 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,637 8 5 29087,21 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 7,995 6 32 dan 5 32 710,55 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,195 8 Universitas Sumatera Utara 5 29087,21 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 7,995 33 dan 6 33 922,98 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,254 8 6 28968,03 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 7,962 7 34 dan 6 33 922,98 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,254 8 6 28968,03 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 7,962 35 dan 6 35 4960,05 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 1,363 8 36 dan 7 36 2663,95 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,732 8 7 28545,79 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 7,846 8 37 dan 7 37 872,85 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,240 8 7 28545,79 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 7,846 38 dan 8 38 653,49 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,180 8 8 28245,23 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 7,764 9 39 dan 8 39 2249,91 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,618 8 8 28245,23 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 7,764 40 dan 9 40 3761,98 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 1,034 8 9 26462,1 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 7,274 10 41 dan 9 41 3372,34 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,927 8 9 26462,1 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 7,274 42 dan 10 42 3874,91 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 1,065 9 10 29409,77 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 8,084 11 43 dan 10 43 1716,33 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,472 9 10 29409,77 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 8,084 44 dan 11 44 2043,72 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,562 9 11 31336,42 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 8,613 Universitas Sumatera Utara 12 45 dan 12 45 113,49 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,031 9 12 31096,91 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 8,547 13 13 dan 12 13 34445,03 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 9,468 10 12 31096,91 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 8,547 14 45 dan 13 45 113,49 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,031 10 13 34445,03 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 9,468 44 dan 14 44 2043,72 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,562 9 14 32541 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 8,944 15 43 dan 14 43 1716,33 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,472 9 14 32541 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 8,944 42 dan 15 42 3874,91 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 1,065 9 15 29441,75 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 8,093 16 41 dan 15 41 3372,34 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,927 9 15 29441,75 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 8,093 40 dan 15 40 3761,98 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 1,034 9 15 29441,75 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 8,093 46 dan 16 46 19760,7 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 5,432 6 16 9540,56 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 2,622 17 39 dan 16 39 2249,91 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,618 3 16 9540,56 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 2,622 38 dan 17 38 653,49 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,180 3 17 9412,26 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 2,587 18 37 dan 17 37 872,85 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,240 3 Universitas Sumatera Utara 17 9412,26 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 2,587 36 dan 18 36 2663,95 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,732 3 18 8387,53 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 2,305 19 35, 18 dan 19 18 8387,53 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 2,305 3 19 8294,42 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 2,280 35 4960,05 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 1,363 20 34 dan 19 34 2708,11 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,744 3 19 8294,42 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 2,280 33 dan 20 33 922,98 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,254 3 20 9506,78 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 2,613 21 32 dan 20 32 710,55 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,195 3 20 9506,78 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 2,613 31 dan21 31 2316,72 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,637 3 21 9667,04 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 2,657 22 46 dan 21 46 19760,7 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 5,432 6 21 9667,04 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 2,657 30 dan 21 30 3844,78 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 1,057 3 21 9667,04 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 2,657 29 dan 22 29 3373,27 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,927 9 22 29410,87 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 8,084 23 28 dan 22 28 3876,56 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 1,066 9 22 29410,87 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 8,084 27 dan 23 27 1712,09 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,471 9 Universitas Sumatera Utara 23 32511,71 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 8,936 24 26 dan 23 26 2016,68 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,554 9 23 32511,71 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 8,936 25 dan 24 25 122,39 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,034 10 24 34397,34 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 9,455 25 31 dan 46 31 2316,72 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,637 6 46 19760,7 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 5,432 26 32 dan 46 32 710,55 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,195 6 46 19760,7 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 5,432 27 33 dan 46 33 922,98 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,254 6 46 19760,7 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 5,432 28 34 dan 46 34 2708,11 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,744 6 46 19760,7 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 5,432 29 35 dan 46 35 4960,05 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 1,363 6 46 19760,7 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 5,432 30 36 dan 46 36 2663,95 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,732 6 46 19760,7 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 5,432 31 37 dan 46 37 872,85 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,240 6 46 19760,7 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 5,432 32 38 dan 46 38 653,49 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,180 6 46 19760,7 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 5,432 33 39 dan 46 39 2249,91 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 0,618 6 46 19760,7 1 1 1 6,35 5821,017 9429,75 9429,75 5821,017 3638,135 11340 OK 5,432 Universitas Sumatera Utara BAB V PERENCANAAN STRUKTUR RANGKA ATAP DENGAN BAJA KONVENSIONAL Model struktur rangka atap yang akan dianalisis sama dengan model struktur rangka atap baja ringan. Ini dimaksudkan untuk mendapatkan perbandingannya.

5.1 Pemodelan Struktur Rangka Atap