Home Owner Builder HPO - Questions With Efficient
Solutions
How far must air intake be from regular/over pressure relieve device of gas?
Right Ans - At least 3m radius, 4.5 m up and 1 m side to side for exhaust vents
What temp must concrete be kept at? Right Ans - 10 C for 72 hours
Maximum size of aggregate? Right Ans - 1/5 size of vert form. 1/3 size of
flatwork.
Max spacing for studs, joints, etc... Right Ans - 2 ft max
Min show load on roof? Right Ans - 1 kPa
Min ceiling heights in living space Right Ans - 2.1 m or 6'9''
Drain pipe min size Right Ans - 100 mm
Min load rating for soil under footing? Right Ans - 75 kPa
Min width for strip footing Right Ans - 250mm or 10" exterior and 200mm
or 8" interior. 350mm or 14" for 2 story.
Min concrete slab thickness Right Ans - 75 mm or 3"
Min crawl space opening Right Ans - 500mm x700mm
Vents are required to have... Right Ans - 25% min top and bottom of space
How big before header needs to be doubled? Right Ans - 1.2 m 3' 11"
Min door height Right Ans - 1980 mm or 6'6"
Windows and doors must have... Right Ans - Fire resistance rating and
thermal break for metal frames
Min stair width Right Ans - 900 mm. Just under 3 feet
, Min nosing size? Right Ans - 25 mm
Min size for stair tread Right Ans - 210mm-235mm w/nosing
Min tread thickness Right Ans - 25 mm
What are kept from freezing for the entire build? Right Ans - Excavations
How deep must footings be in undetered soil? Right Ans - 1.2 m and not
less than frost line
Min clearance between concrete or masnory chimeny and combustible
framing? Right Ans - 50 mm. 100 interior.
Sill plates min size Right Ans - 2x4
Min joist end bearing on framing Right Ans - 1.5 inches
Anchor bolt min depth to concrete Right Ans - 4 in.
Min anchor bold size + spacing? Right Ans - 1/2 in. and 2.4 m OC
Floor cross bracing min board size Right Ans - 19mm x 64 mm or 1"x3"
Min overlap of siding Right Ans - 1 in.
Flashing details Right Ans - 2 in back min. 6% slope min. 5mm drip offset.
Maximum furring spacing Right Ans - 24 in. or 600 mm.
Min penetration of siding nail into framing Right Ans - 19 mm or 3/4 in.
Maximum distance from roof for final nail in drywall Right Ans - 8 in. or
200 mm.
In bathrooms/kitchen what must be installed for permeable materials?
Right Ans - a membrane not exceeding 18 ng.
Solutions
How far must air intake be from regular/over pressure relieve device of gas?
Right Ans - At least 3m radius, 4.5 m up and 1 m side to side for exhaust vents
What temp must concrete be kept at? Right Ans - 10 C for 72 hours
Maximum size of aggregate? Right Ans - 1/5 size of vert form. 1/3 size of
flatwork.
Max spacing for studs, joints, etc... Right Ans - 2 ft max
Min show load on roof? Right Ans - 1 kPa
Min ceiling heights in living space Right Ans - 2.1 m or 6'9''
Drain pipe min size Right Ans - 100 mm
Min load rating for soil under footing? Right Ans - 75 kPa
Min width for strip footing Right Ans - 250mm or 10" exterior and 200mm
or 8" interior. 350mm or 14" for 2 story.
Min concrete slab thickness Right Ans - 75 mm or 3"
Min crawl space opening Right Ans - 500mm x700mm
Vents are required to have... Right Ans - 25% min top and bottom of space
How big before header needs to be doubled? Right Ans - 1.2 m 3' 11"
Min door height Right Ans - 1980 mm or 6'6"
Windows and doors must have... Right Ans - Fire resistance rating and
thermal break for metal frames
Min stair width Right Ans - 900 mm. Just under 3 feet
, Min nosing size? Right Ans - 25 mm
Min size for stair tread Right Ans - 210mm-235mm w/nosing
Min tread thickness Right Ans - 25 mm
What are kept from freezing for the entire build? Right Ans - Excavations
How deep must footings be in undetered soil? Right Ans - 1.2 m and not
less than frost line
Min clearance between concrete or masnory chimeny and combustible
framing? Right Ans - 50 mm. 100 interior.
Sill plates min size Right Ans - 2x4
Min joist end bearing on framing Right Ans - 1.5 inches
Anchor bolt min depth to concrete Right Ans - 4 in.
Min anchor bold size + spacing? Right Ans - 1/2 in. and 2.4 m OC
Floor cross bracing min board size Right Ans - 19mm x 64 mm or 1"x3"
Min overlap of siding Right Ans - 1 in.
Flashing details Right Ans - 2 in back min. 6% slope min. 5mm drip offset.
Maximum furring spacing Right Ans - 24 in. or 600 mm.
Min penetration of siding nail into framing Right Ans - 19 mm or 3/4 in.
Maximum distance from roof for final nail in drywall Right Ans - 8 in. or
200 mm.
In bathrooms/kitchen what must be installed for permeable materials?
Right Ans - a membrane not exceeding 18 ng.
