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Numbers
-height of crawl spaces 600mm
- height of basement 1.95 underside joists
-height of basement living space 2.3
-crawl space and
attick openings 500x 700
-foundation wall ends 150 above grade for
masonry
-foundation wall ends 200 above grade for wood
exterior finish
-basement slab concrete 20 mpa, add
fiber mesh to help eliminate cracks
-5 to 8% air entrainment
- self mixing 20 litre water for 40 kg bag
-footings never less than 100 thick
-water table with in width in depth from
footing double size of footing
-column footings single story 640 by 640, two
story 870 by 870, minimum thickness with out reinforcement 100
-step footing vertical connection between steps
150, horizontal distance between steps 600,
vertical distance
between steps 600
-foundation walls 150 to 300 thick
-wood beams in concrete foundation wall must
have a 12 air space if untreated and below grade
-beam must bear on concrete foundation wall by 90, joists must bear 38
- anchour bolts 12.7 diameter, spaced at 2400,
embedded 100
-15 mil polyethylene under slab and between
slab and wall, lap 100
- 25 sand cushion between slab and footing
-wall control joints tapered 20 to 12, walls
longer than 25 m have joints every 6000, 3000 from corners,
sides windows and doors
-slabs 75 thick sloped to drain, 100 crushed
rock under slab
-control joints slab 4.5 to 6 m in either
direction, slab cure 5 to 7 days
-slab on grade 200 above finished grade
-slab reinforced with 10m at 600 centre both
ways
-hydrostatic pressure beneath slab need water
proof membrane from all membrane continuous between two
75 thick pourings of slab
-100 foundation weeping tile laid on solid
soil, top tile is below basement floor, covered with 150 crushed rock
-window wells must be drained with 150 pipe to
weeping tiles wells
-insulating foundation must be 600 below grade
exterior or interior
-crawl spaces covered with rolled “S” roofing
or .15 polyethylene
-crawl space access doors 500 to 700 dwelings
550 to 900 others
-heated crawl space walls must be insulated to
600 down interior or exterior insulation
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