A reinforced block foundation wall must resist soil pressure from backfill. Which of these mortar types is the usual choice?
- Type N
- Type O
- Type S
- Type K
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C. Type S
Type S has high bond and compressive strength and is the usual pick for below-grade walls and walls with lateral load. Type N is intended for general above-grade work, and O and K are low-strength mortars for non-loadbearing or restoration work.
Reference: ASTM C270 (mortar for unit masonry), guide for selection
A brick is laid standing on end with its narrow long face showing in the wall. What is this position called?
- Stretcher
- Header
- Rowlock
- Soldier
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D. Soldier
A soldier stands upright with the narrow face exposed, often used over openings. A stretcher lies flat with the same long narrow face exposed horizontally.
Reference: Masonry construction: brick positions
Where are weep holes placed in a brick veneer or cavity wall?
- In the top course just below the coping
- In the course directly on top of the flashing
- At mid-height of each storey of the wall
- In the bed joint one course under the flashing
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B. In the course directly on top of the flashing
Water that gets behind the veneer runs down to the flashing and must drain out, so weeps go in the head joints immediately above it. A weep below the flashing would have no water to drain.
Reference: Masonry cavity wall detailing: flashing and weeps