A wood guard is installed at an elevated floor edge in a commercial building. What minimum guard height is generally required by the IBC?
Correct Answer
D) 42 in.
IBC guard provisions generally require guards to be at least 42 in. high above the adjacent walking surface, with listed exceptions. Other choices confuse guard height with handrail or residential dimensions.
Why This Is the Correct Answer
IBC guard provisions generally require guards to be at least 42 in. high above the adjacent walking surface, with listed exceptions. Other choices confuse guard height with handrail or residential dimensions.
Why the Other Options Are Wrong
Option A: 30 in.
In wood framing, 30 in. is the wrong selection for Guards: 30 in. is an IBC dimensional value for a different stair, door, or egress condition.
Option B: 34 in.
The trap in B is 34 in. That selection is wrong because 34 in. is an IBC dimensional value for a different stair, door, or egress condition.
Option C: 36 in.
Choice C gives 36 in. Its specific error: 36 in. is an IBC dimensional value for a different stair, door, or egress condition.
Memory Technique
File guards under a weep path: condition first, number or duty second, answer 42 in.
Reference Hint
Open International Building Code 2021 or 2024; use IBC 2021/2024 Section 1015.3 guard height to confirm that IBC guard provisions generally require guards to be at least 42 in.
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