footing_final.xlsx

	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	R	S	T
1	31
2							ISOLATED FOOTING
3
4		DATA :
5				fcu =	275	kg/cm2		Column Dimensions :				Foundation level =				-1.50	m
6				fy =	3600	kg/cm2		b =	30	cm
7				N working =	300	ton		t =	340	cm
8				q all net =	17.5	t/m2
9				P.C. th =	30	cm
10
11			1	Area p.c=	18.86	m2
12				L P.C. =	2.00	m
13				B P.C. =	2.00	m
14
15			2	Dim of R.C.						7	Rft
16				L R.C. =	1.40	m					As I =	101.98	cm2		As min =		-13.52	cm2
17				B R.C. =	-1.70	m					As II =	-83.98	cm2		As min =		11.13	cm2
18
19			3	q =	-189.08	t/m2					As I =	51	F	16	/	-1.70	m
20											As II =	6	F	16	/	1.40	m
21			4	Moment at Critical Sections
22				M I =	160.71	m.t.					As I =	5	F	16	/	m'
23				M II =	-132.35	m.t.	take C1 =	5.00			As II =	5	F	16	/	m'
24				d I =	#NUM!	cm	J =	0.826
25				d II =	#NUM!	cm	choose F	16
26				take:
27				t =	60	cm
28				d =	53	cm
29
30			5	Check Punching
31				P u =	450.00	ton
32				Q p =	1066.75	ton
33				q p =	21.14	kg/cm2	UNSAFE
34				qp cu =	7.96	kg/cm2			increase d
35
36			6	Check Shear
37				Q sh1 =	-406.61	ton
38				Q sh2 =	334.85	ton
39				q sh1 =	45.13	kg/cm2
40				q sh2 =	45.13	kg/cm2	UNSAFE
41				qsh cu =	6.60	kg/cm2			increase d
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