Question

Determine the number of cubic feet of concrete needed to pour two sets of the spread footings and piers shown in the figure below. Use a 10 percent waste factor.

Choices for QUESTION 2 :

A) 33 pounds

B) 26 pounds

C) 39 pounds

D) 24 pounds

Determine the number of cubic feet of concrete needed to pour two sets of the spread footings and piers shown in the figure below. Use 10 percent waste factor. 4"x4" WOOD COLUMN PB44 COLUMN BASE - -2'-6"- ! '2'-6" #3 TES @ 3" OC 4 EARL 4 EA. #5 DOWELS 4 EA, #4 REBAR BOTH WAYS - #5 REBAR 10" L < - - #3 TIES SECTION A-A' -2-611- Question 6 2 pts Determine (in pounds) the amount of rebar needed for the ties of two piers as shown in the figure in Q5. Allow for two inches of concrete cover. (hint: unit weight of #3 rebar is 0.376 lb/lf)

Answer 1

→ 85) volume of footing 30x30x10 2 9000 cuin 25.21 cu.ft volume of piera lxlx 3' T 10 2 3 Cuift. Total volume e 5.21+ 3 2 8.21 luft malla volume Ifta 12 inches Density 26" & ex 1²+ 6 = 30" use waste factor of 10% 8.21 . Actual volume required that 837 ? Foi37 G 29.12 cu.ft There are two sets of footings & piers & Total volume required a 9. 12x2 - 1824 Cui ft. Length of one tie z 4x (12"-2") & hook length T hook length 16% of least #5 rebuth. a si lateral dimension Moto X 1062 #3 ties length Yhool

Length of each tie. 4x10" + 2x1" - 2 42" 2 3.5 ft. #3 ties are at 3" oc. : No. of ties required - Total span a spacing 2 3 28" 4 2 12 No's . to Total length of thes = 12x3.5 2 42 min ft. liven unit wt. of #3 tiesa 0.376 Ablet .. wt of tiesa 42 ft x 0.376 lb/if a is. 792 lb. For two piers wt. of ties required a 15.792 x 2 2 31.6 lb. (Adjust length of hook if required according to the local code).