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
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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
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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
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Detail pemasangan sekrup pada joint 7
Gambar 4.9. Detail Pemasangan Sekrup pada Joint 7
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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
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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
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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
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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
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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