BC OWNER BUILDER COMPREHENSIVE
STUDY GUIDE 2026 FULL QUESTIONS AND
SOLUTIONS GRADED A+
◍ How far must air intake be from regular/over pressure relieve device of
gas?.
Answer: At least 3m radius, 4.5 m up and 1 m side to side for exhaust vents
◍ What temp must concrete be kept at?.
Answer: 10 C for 72 hours
◍ Maximum size of aggregate?.
Answer: 1/5 size of vert form. 1/3 size of flatwork.
◍ Max spacing for studs, joints, etc....
Answer: 2 ft max
◍ Min show load on roof?.
Answer: 1 kPa
◍ Min ceiling heights in living space.
Answer: 2.1 m or 6'9''
◍ Drain pipe min size.
Answer: 100 mm
◍ Min load rating for soil under footing?.
Answer: 75 kPa
◍ Min width for strip footing.
Answer: 250mm or 10" exterior and 200mm or 8" interior. 350mm or 14"
for 2 story.
◍ Min concrete slab thickness.
, Answer: 75 mm or 3"
◍ Min crawl space opening.
Answer: 500mm x700mm
◍ Vents are required to have....
Answer: 25% min top and bottom of space
◍ How big before header needs to be doubled?.
Answer: 1.2 m 3' 11"
◍ Min door height.
Answer: 1980 mm or 6'6"
◍ Windows and doors must have....
Answer: Fire resistance rating and thermal break for metal frames
◍ Min stair width.
Answer: 900 mm. Just under 3 feet
◍ Min nosing size?.
Answer: 25 mm
◍ Min size for stair tread.
Answer: 210mm-235mm w/nosing
◍ Min tread thickness.
Answer: 25 mm
◍ What are kept from freezing for the entire build?.
Answer: Excavations
◍ How deep must footings be in undetered soil?.
Answer: 1.2 m and not less than frost line
◍ Min clearance between concrete or masnory chimeny and combustible
framing?.
Answer: 50 mm. 100 interior.
◍ Sill plates min size.
STUDY GUIDE 2026 FULL QUESTIONS AND
SOLUTIONS GRADED A+
◍ How far must air intake be from regular/over pressure relieve device of
gas?.
Answer: At least 3m radius, 4.5 m up and 1 m side to side for exhaust vents
◍ What temp must concrete be kept at?.
Answer: 10 C for 72 hours
◍ Maximum size of aggregate?.
Answer: 1/5 size of vert form. 1/3 size of flatwork.
◍ Max spacing for studs, joints, etc....
Answer: 2 ft max
◍ Min show load on roof?.
Answer: 1 kPa
◍ Min ceiling heights in living space.
Answer: 2.1 m or 6'9''
◍ Drain pipe min size.
Answer: 100 mm
◍ Min load rating for soil under footing?.
Answer: 75 kPa
◍ Min width for strip footing.
Answer: 250mm or 10" exterior and 200mm or 8" interior. 350mm or 14"
for 2 story.
◍ Min concrete slab thickness.
, Answer: 75 mm or 3"
◍ Min crawl space opening.
Answer: 500mm x700mm
◍ Vents are required to have....
Answer: 25% min top and bottom of space
◍ How big before header needs to be doubled?.
Answer: 1.2 m 3' 11"
◍ Min door height.
Answer: 1980 mm or 6'6"
◍ Windows and doors must have....
Answer: Fire resistance rating and thermal break for metal frames
◍ Min stair width.
Answer: 900 mm. Just under 3 feet
◍ Min nosing size?.
Answer: 25 mm
◍ Min size for stair tread.
Answer: 210mm-235mm w/nosing
◍ Min tread thickness.
Answer: 25 mm
◍ What are kept from freezing for the entire build?.
Answer: Excavations
◍ How deep must footings be in undetered soil?.
Answer: 1.2 m and not less than frost line
◍ Min clearance between concrete or masnory chimeny and combustible
framing?.
Answer: 50 mm. 100 interior.
◍ Sill plates min size.
