A formed equipment pedestal outdoors contains No. 8 vertical bars next to the formed side face. Under the ACI cover table, the side cover may not be less than which value?
Correct Answer
C) 2 in.
ACI 318-19 Table 20.6.1.3.1 requires 2 in. minimum cover for formed concrete exposed to earth or weather when the reinforcement is No. 6 through No. 18 bars. Other choices: 3/4 in. is for interior slab or wall reinforcement, 1 in. is a common but nonmatching guess here, and 3 in. is the cast-against-earth value.
Why This Is the Correct Answer
ACI 318-19 Table 20.6.1.3.1 requires 2 in. minimum cover for formed concrete exposed to earth or weather when the reinforcement is No. 6 through No. 18 bars.
Why the Other Options Are Wrong
Option A: 3/4 in.
The trap in A is 3/4 in. That selection is wrong because 3/4 in. is a concrete-cover value for a different exposure/member case; ACI 318-19 Table 20.6.1.3.1 keys this item to 2 in.; Formed exterior concrete with No. 6 through No. 18 bars needs 2 in. cover.
Option B: 1 in.
Choice B gives 1 in. Its specific error: 1 in. is a concrete-cover value for a different exposure/member case; ACI 318-19 Table 20.6.1.3.1 keys this item to 2 in. The accepted answer is 2 in.
Option D: 3 in.
In concrete work, 3 in. is the wrong selection for Concrete cover: 3 in. is a concrete-cover value for a different exposure/member case; ACI 318-19 Table 20.6.1.3.1 keys this item to 2 in.
Memory Technique
Treat concrete cover like a labeled shelf; only the matching condition belongs with 2 in.
Reference Hint
Open ACI 318-19, Building Code Requirements for Structural Concrete; use ACI 318-19 Table 20.6.1.3.1 to confirm that ACI 318-19 Table 20.6.1.3.1 requires 2 in.
More NASCLA Questions
Bid instructions require bid security with each sealed bid. Which purpose should the estimator associate with that requirement?
A wood deck surface has 320 sf of coverage. Boards have a 5-1/2 in. actual face width, and the order includes an 8 percent cutting allowance. What linear footage is closest?
Using the dimensions shown for the stabilized construction entrance, what is the plan area?
A reroof area requires 14,720 sf of rigid insulation. Boards are 4 ft by 8 ft, and the order includes 5 percent waste. How many boards are needed?
Two addenda revise the drawings before bid day. What must a responsive bidder normally do with those addenda?
A utility trench is 180 ft long, 3 ft wide, and 7 ft deep with vertical sides inside a trench shield. What excavation volume is required?
A 120 ft long Type C trench is cut with a 4 ft bottom width and a 6 ft depth. If side slopes are 1-1/2 horizontal to 1 vertical, what excavation volume is closest?
A storm pipe run needs 240 ft of bedding, 4 ft wide and 6 in. thick. Including a 10 percent ordering allowance, how many cubic yards of bedding aggregate are needed?
A mass excavation produces 1,180 loose cubic yards of material for off-site disposal. End-dump trucks can haul 18 loose cubic yards per trip. What truck count is required?
An asphalt-shingle roof has a slope of 3:12. Under the IBC low-slope asphalt-shingle provisions, what underlayment arrangement is required?
People Also Study
Business & Financial Management
120 questions · 70% to pass
Contract Administration
60 questions · 70% to pass
Project Management
60 questions · 70% to pass