A solid-web diagonal brace is being installed for frame stability during steel erection. What minimum bolt condition does OSHA allow at each brace connection?
Correct Answer
A) At least one bolt per connection drawn up wrench-tight
OSHA 1926.756(b) allows solid web structural members used as diagonal bracing to be secured by at least one bolt per connection drawn up wrench-tight, or the equivalent specified by the structural engineer of record. Other choices overstate, understate, or replace the OSHA condition.
Why This Is the Correct Answer
OSHA 1926.756(b) allows solid web structural members used as diagonal bracing to be secured by at least one bolt per connection drawn up wrench-tight, or the equivalent specified by the structural engineer of record. Other choices overstate, understate, or replace the OSHA condition.
Why the Other Options Are Wrong
Option B: Two fully pretensioned bolts at each connection
In metals work, Two fully pretensioned bolts at each connection is the wrong selection for Diagonal bracing: the choice would not get the project to A.
Option C: Treat the condition as requiring no bolts if a tack weld is present
The trap in C is No bolts if a tack weld is present. That selection is wrong because the option does not produce the required Diagonal bracing outcome, A.
Option D: Set the diagonal bracing threshold at Four bolts before any fit-up load is released
Choice D gives Four bolts before any fit-up load is released. Its specific error: it points to Four bolts before any fit-up load is released, but.
Memory Technique
Link diagonal bracing to its book condition; a different condition means a different answer than At least one bolt per connection drawn up wrench-tight.
Reference Hint
Open 29 CFR Part 1926, Subpart R - Steel Erection; use 29 CFR 1926.756(b) to confirm that OSHA 1926.756(b) allows solid web structural members used as diagonal bracing to be secured by at least one bolt per connection drawn up wrench-tight, or the equivalent specified by the structural engineer of record.
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