Squre Footing Design (wsd)

Proj. Name: Location: Client: Designer: Date:

2 - Storey Resd'l. Bldg. Lolita Village, Brgy. Caibaan, Tac. City Pitao BL Pitao BL 2/7/2008

General Description: Square Footing

SQUARE FOOTING DESIGN (WSD) fc' :

2,500.00 17.24 7.76 30,000.00 206.90

fc = fs :

psi Mpa psi Mpa

Es = Ec = 4730√fc' n = Es/Ec k = n/(n+fs/fc) j = 1-k/3 R = fckj/2

200,000.00 Beam Dimension: 19,640.26 b 10.18 Beam # 1 300.00 0.276 Beam # 2 250.00 0.908 Length 0.97 Slab 3.25

DEADLOAD: BEAM: SLAB: WALL: Column: TOTAL: ROOFING: SIESMIC:

14,744.43 32,520.15 45,910.80 15,362.46 108,537.84 33,150.00 35,421.96

Newton Newton Newton Newton Newton Newton Newton

33,150.00

Newton

314,935.31

Newton

Thickness Wall Ht. Col. Dimen. Col.Height Roofing

0.10 2.6 0.30 7.25 3.25

d 300.00 300.00 Width 4.25 meter meter meter meter 4.25

LIVELOAD: 2,400.00 TOTAL LOAD: P Allow. Soil Bearing Pressure:

240.00 34.78 18,896.12

Assume Weight of Footing = 6% (Load) TOTAL AXIAL LOAD =

333,831.43

Footing Area Required: L =

1.391 1.179

Try : L =

1.20

meter

NET UPWARD SOIL PRESSURE:p = MOMENT, M =

28,167.03

N -m

d = sqrt(M/Rb)

155.30

mm.

Final Depth, d =

305.30

mm. 0.24

CHECK FOR BEAM SHEAR: V = pL

Kpa Psi Newton

Newton sq.m. meter Area =

1.44

sq.m. 0.450

0.21 0.30

Critical section for Moment

68,074.60 Newton

v = V/bd

0.28 Mpa

va =.09sqrt(fc')

0.37 Mpa

0.30

1.20

If va > v, Safe Na Bay!!! Critical section for beam shear CHECK FOR PUNCHING SHEAR: d/2 Vp =

312,181.16 Newton 0.30

vp = Vp/Ap

0.422 Mpa

va = .17sqrt(fc')

0.71 Mpa

d/2

If va > vp, Safe Gyud na Kaayo Bay!!!

0.30

231,827.38 N/sq.m.

1.20

Compute Steel Rquirements: As = M/fsjd No. of Bars 4.0

491.172 sq.mm Bar Diameter Area, sq.mm 12 113.09

CHECK FOR BOND STRESS: u = V/Σojd 452.38 sq.mm

Σo = Area bn V = pL(L-d)/2

125,186.78 Newton

u =

0.998 Mpa

ua = 10.14sqrt(fc')/D

3.51 Mpa

If ua > u, Safe Gyud Na Bay !!! Check Weight of Footing: Total Depth, d

248.30

Wt. Of Footing

8,418.11

mm Newton

CHECK FOR THE REQUIRED AREA: A = Trial Area =

1.347

sq.m.

1.440

sq.m.

If Trial Area>Computed Area, It is Safe

m

or Moment

1.20 m