A structural steel column base detail is checked before erection. What minimum number of anchor rods does OSHA require for each column?
Correct Answer
B) Four anchor rods
OSHA 1926.755(a)(1) requires all columns to be anchored by a minimum of four anchor rods or anchor bolts. Other choices are either below the minimum or simply larger than the stated OSHA minimum.
Why This Is the Correct Answer
OSHA 1926.755(a)(1) requires all columns to be anchored by a minimum of four anchor rods or anchor bolts. Other choices are either below the minimum or simply larger than the stated OSHA minimum.
Why the Other Options Are Wrong
Option A: Two anchor rods
In metals work, Two anchor rods is the wrong selection for Column anchorage: it leaves out the controlling Column anchorage result: Four anchor rods.
Option C: Six anchor rods
Choice C gives Six anchor rods. Its specific error: the option does not produce the required Column anchorage outcome, Four anchor rods.
Option D: Eight anchor rods
Choice D (Eight anchor rods) is rejected because it points to Eight anchor rods, but.
Memory Technique
Treat column anchorage like a labeled shelf; only the matching condition belongs with Four anchor rods.
Reference Hint
Open 29 CFR Part 1926, Subpart R - Steel Erection; use 29 CFR 1926.755(a)(1) to confirm that OSHA 1926.755(a)(1) requires all columns to be anchored by a minimum of four anchor rods or anchor bolts.
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