##### Question

In: Civil Engineering

# QUESTIONS: Design a square column footing for a 20-in. square tied interior column that supports loads...

QUESTIONS:

Design a square column footing for a 20-in. square tied interior column that supports loads of DL (170) k and Live load LL (210) k. The column is reinforced with eight No 8 bars, the bottom of the footing is 5 foot below final grade, and the soil weighs 100 lb. /ft3 the allowable soil pressure is 4 w ksf. The concrete strength is 4,000 psi and the steel is Grade 60.

## Solutions

##### Expert Solution

Aquare column footing - Bouch Luan tid interior column that bupats lode of Sad Loods Hok W Love Crad - 20k - W, cotiem Haned u g baw final grade Bottom of the tooling anfoot below soit weighs 100 lb lihts allowable oil presunt = uw kot concrete strength - 4,000 psi. Grade of steel = 60 canal force bath at the clumn plain conent footing In case ot, tilt bonito er of of column have occurs bove: artal road at the Total axial load => wetuz. => HO + 210 + 38 ok Portoud lood Pue S05 & 570k

Lomoting beating Bir af Me column groting intefare A: 12020 coin Death in the c u gotuned by the column Race and not at the footine face be mat 055* 4000+ 0 Pamazoops mit bearing haittance fes - 1800 HOD 420000 px 420000W > Actoled lood CR Thus fuul transfer of toodangu pouble column without any reinforcement from tootrng to della ton of the size of the facting required hock felt about 101.04 e column Bree 10( 380) 380k. 105 Bay area required a 3 380 +38 104. #

Fecting a prouded = 10. 1 103# 1. Lou-OUP * coleculating the depth of footing: - besestal grade of feating depth to sleet. O fenten det footing depth D & le 10.2-0.4) & tanca eahere Tan & 2 0.9 1009 mar tot size Duo-2 102851H. 5200 ft Bequetied mi rtino curat quid Re n t 0-12 . 1 min 0.002 0215 - 0.06.de provided 8 no of dia of bars. 5 88 "/28") 40213gen provided in the both the duiston curth Ast clear cover => 0.24603 t oaste Spacing of bars & 10.2 - 0.25 (2) - 188/10 Spacing of bars = 1.2905ft/

** Check for fort beamong pressure given wat werght of 8011 af 100 lbffes concrete strength e 4000 psi Sell base preserve -> \$80 + 1100(5) + 10-2012 10oC) 9hos 3-6524 + 20,000 + 150 =Y 20153 .65 psi Sort Base prekure = 20,153-65 2100RSF Ok - Soinske 80 bon coord 10. 13 Pensortiment detailing

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