Brick veneer flashing is installed above a shelf angle. What maximum on-center spacing is commonly used for open head-joint weeps under the IBC masonry veneer provisions?
Correct Answer
D) 33 in.
IBC masonry veneer provisions commonly limit weep-hole spacing to 33 in. on center so water can drain from the cavity. Other choices: 16 in. and 24 in. are tighter than the common prescriptive maximum, while 48 in. is too wide.
Why This Is the Correct Answer
IBC masonry veneer provisions commonly limit weep-hole spacing to 33 in. on center so water can drain from the cavity.
Why the Other Options Are Wrong
Option A: 16 in.
The trap in A is 16 in. That selection is wrong because 16 in. is an IBC dimensional value for a different stair, door, or egress condition.
Option B: 24 in.
Choice B gives 24 in. Its specific error: 24 in. is an IBC dimensional value for a different stair, door, or egress condition.
Option C: 48 in.
Choice C (48 in.) is rejected because 48 in. is an IBC dimensional value for a different stair, door, or egress condition.
Memory Technique
File veneer drainage under a flashing lip: condition first, number or duty second, answer 33 in.
Reference Hint
Open International Building Code 2021 or 2024; use IBC masonry veneer flashing and weep provisions to confirm that IBC masonry veneer provisions commonly limit weep-hole spacing to 33 in.
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