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139 Perencanaan Struktur Gedung Sekolah 2 Lantai dan RAB
Bab 5 Perencanaan Plat Lantai dan Atap n =
s b
=
200 1000
= 5 As ada
= 5. ¼ . p . 10
2
= 392,699 mm
2
As
perlu
232,122 mm
2
…..… OK
Dipakai tulangan Æ10 – 200 mm
5.15. Penulangan lapangan arah x
Mu = 180,648 kgm = 1,80648.10
6
Nmm Mn
= f
Mu =
6 6
10 .
2581 ,
2 8
, 10
. 80648
, 1
= Nmm
Rn =
=
2
.dx b
Mn
=
2 6
75 .
1000 10
. 2581
, 2
0,4014 Nmm
2
m =
12 ,
14 20
. 85
, 240
. 85
, =
= c
f fy
r
perlu
= ÷
÷ ø
ö ç
ç è
æ -
- fy
Rn .
m 2
1 1
. m
1
= ÷
÷ ø
ö ç
ç è
æ -
- 240
4014 ,
. 12
, 14
. 2
1 1
. 12
, 14
1
= 0,001693 r
r
min
, di pakai r
min
= 0,0025 As
perlu
= r
min
. b . dx = 0,0025 . 1000 . 75
= 187,5 mm
2
Digunakan tulangan Æ 10 As = ¼ . p . 10
2
= 78,539 mm
2
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140 Perencanaan Struktur Gedung Sekolah 2 Lantai dan RAB
Bab 5 Perencanaan Plat Lantai dan Atap S =
perlu
As b
As .
=
5 ,
187 1000
. 539
, 78
= 418,87 ~ 200 mm S
max
= 2h n =
s b
=
200 1000
= 5 As ada
= 5. ¼ . p . 10
2
= 392,699 mm
2
As
perlu
187,5 mm
2
…..… OK
Dipakai tulangan Æ10 – 200 mm
5.16. Penulangan lapangan arah y
Mu = 120,456 kgm = 21,20456.10
6
Nmm Mn
= f
Mu =
6 6
10 .
5057 ,
1 8
, 10
. 20456
, 1
= Nmm
Rn =
=
2
.dx b
Mn
=
2 6
75 .
1000 10
. 5057
, 1
0,2677 Nmm
2
m =
12 ,
14 20
. 85
, 240
. 85
, =
= c
f fy
r
perlu
= ÷
÷ ø
ö ç
ç è
æ -
- fy
Rn .
m 2
1 1
. m
1
= ÷
÷ ø
ö ç
ç è
æ -
- 240
2677 ,
. 12
, 14
. 2
1 1
. 12
, 14
1
= 0,001124 r
r
max
r r
min
, di pakai r
min
0,0025 As
perlu
= r
min
. b . dx = 0,0025 . 1000 . 75
= 187,5 mm
2
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141 Perencanaan Struktur Gedung Sekolah 2 Lantai dan RAB
Bab 5 Perencanaan Plat Lantai dan Atap Digunakan tulangan Æ 10
As = ¼ . p . 10
2
= 78,539 mm
2
S =
perlu
As b
As .
=
5 ,
187 1000
. 539
, 78
= 418,87 ~ 200 mm S
max
= 2h n =
s b
=
200 1000
= 5 As ada
= 5. ¼ . p . 10
2
= 392,699 mm
2
As
perlu
187,5 mm
2
…..… OK
Dipakai tulangan Æ10 – 200 mm
5.17. Rekapitulasi Tulangan
Dari perhitungan diatas diperoleh :
Tulangan lapangan arah x Æ 10 – 200 mm Tulangan lapangan arah y Æ 10 – 200 mm
Tulangan tumpuan arah x
Æ 10 – 200 mm
Tulangan tumpuan arah y
Æ 10 – 200 mm
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Perencanaan Struktur Gedung Sekolah 2 Lantai dan RAB
BAB 6 Perencanaan Balok Anak
4 00 4 00
4 00 4 00
4 00 4 00
4 00 4 00
4 00 4 00
4 00 4 00
4 00
62 00
200 400
400 600
A B
B C
1 2
1 3
4 5
6 7
8 9
1 1
1 1
2 1
3 1
4 1
5 1
5 1
6
C D
250 250
250 250
A
BAB 6 PERENCANAAN BALOK ANAK
