slab_design_original.xls

	A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Q	R	S	T
1	Two-Way Restrained Solid Slab Design
2	(CP65 : Bending Moment Coefficient Method- Table 3.15)
3
4	Project	:												Type of panel
5	Location	:	Typ. Floor (Unit Type B3)											1. Interior panels
6	Marking	:	S4											2. One short edge discontinuous
7	Thickness	:	250	mm				Panel Type	=	8				3. One long edge discontinuous
8														4. Two adjacent edges discontinuous
9	Material							Dimension						5. Two short edges discontinuous
10	fcu	=	30	N/mm2				Short span, Lx	=	8100	mm			6. Two long edges discontinuous
11	fy	=	460	N/mm2				Long span, Ly	=	10400	mm			7. Three edges discontinuous (one long edge continuous)
12	Cover	=	20	mm				Ratio, Ly / Lx	=	1.28				8. Three edges discontinuous (one short edge continuous)
13	Fire rate	=	1	Hour(s)										9. Four edges discontinuous
14	Bar size	=	12	mm										10. One-way slab
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16	Loading
17	Finishes	=	50	mm				DL	=	9.70	kN/m2
18	Services	=	0.0	kN/m2				LL	=	1.50	kN/m2
19	Others	=	2.5	kN/m2
20	Up-lift pressure (UL)									Design load (1.4DL+1.6LL)
21		=	0	kN/m2				n	=	15.98	kN/m2
22
23						Short span (Lx)								Long span
24						Support				Mid Span				Support				Mid Span
28	Bending moment coefficient,Mcoef.									0.070				0.058				0.044
29
30	M = Mcoef.nlx2									73.09				60.81				46.13
31	Slab Thickness, D									250				250				250
32	Effective depth, d									224.0				224.0				218.0
33	K = M/(1000d2fcu)									0.0486				0.0404				0.0324
34	La = (0.5+SQR(0.25-K/0.9))									0.94				0.95				0.95
35	Z = La*d									211				213				207
36	Asreq = M/(0.87fyZ) - mm2/m									865				714				557
37
38	Rebar size and spacing required								T	12	@	131	T	12	@	158	T	12	@	203
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40	Rebar size and spacing provided							100	T	12	@	100	T	12	@	100	T	12	@	100
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42	Area of reinf't provided (mm2/m)									1131				1131				1131
43	Percentage of reinf't provided (%)									0.51%				0.51%				0.52%
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49	Deflection check
50	Basic span / effective depth ratio				=	26				(Table 3.10)
51	M/bd2 (at mis span of shorter span)				=	1.46
52	Design services stress, fs				=	219.77	N/mm2
53	Modification factor (Tension reinf't)				=	1.46				(Table 3.11)
54	Allowable span / d ratio				=	37.95
55	Actual span / d ratio				=	36.16		Deflection is satisfactory
56
57	Crack control (clause 3.12.11.2.7)
58	i. ) Bar spacing
59	Clear spacing between bars				=	86.8	mm		< 3d, ok!
60
61	ii. ) Other conditions
62	a.) for fy= 460 N/mm2, h <= 200mm
63	b.) for fy= 250 N/mm2, h <= 250mm
64	c.) The steel ratio is less than 0.3%
65	The bar spacing should provided in accordance to Table 3.30
66	The clear bar spacing = 160 for 0% moment redistribution with fy=460
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