What net roof-cricket sheathing area is shown after the skylight opening is deducted?
Correct Answer
D) 408 sf
The net area is the outer rectangle minus the dashed deduction box, or 408 sf.
Why This Is the Correct Answer
The net area is the outer rectangle minus the dashed deduction box, or 408 sf.
Why the Other Options Are Wrong
Option A: 448 sf
This is the full outer rectangle and does not subtract the dashed deduction box.
Option B: 368 sf
This subtracts the deduction box twice.
Option C: 160 sf
This multiplies the full length by only the deduction-box width.
Memory Technique
Net-area hook for roof cricket sheathing net area: big rectangle minus the marked dashed opening.
Reference Hint
Open Sheet S-991; read the outside dimensions and the dashed deduction dimensions.
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