The bid captain reviews the final hour checklist: what force must a top rail withstand?
Correct Answer
A) At least 200 lb outward or downward
At least 200 lb outward or downward is the controlling requirement.502(b)(3). Other choices: the distractors are related-looking contract or field terms, but they do not match the cited requirement for review item 129.
Why This Is the Correct Answer
At least 200 lb outward or downward is the controlling requirement.502(b)(3).
Why the Other Options Are Wrong
Option B: Apply 50 lb to the guardrail top rail force condition
Choice B gives 50 lb. Its specific error: 50 lb is the wrong OSHA fall-protection number for the item asked.
Option C: Apply 100 lb to the guardrail top rail force condition
Choice C (100 lb) is rejected because 100 lb is the wrong OSHA fall-protection number for the item asked.
Option D: Select 150 lb for guardrail top rail force
In general project requirements, 150 lb is the wrong selection for Guardrail top rail force: 150 lb is the wrong OSHA fall-protection number for the item asked.
Memory Technique
Link guardrail top rail force to its book condition; a different condition means a different answer than At least 200 lb outward or downward.
Reference Hint
Open 29 CFR 1926 OSHA Construction Standards; use 29 CFR 1926.502(b)(3) to confirm that At least 200 lb outward or downward is the controlling requirement.502(b)(3).
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