Standards And Tolerances Flashcards
Formal viewing positions for fixtured and appliances
600mm
Formal viewing positions for walls, floors and ceilings
1500mm
Maximum FFL deviation from working drawings
40mmn
Levelness tolerances in concrete floors?
10mm in any room
4mm in any 2m length
Overall 20mm out of level over whole house
Defective crack sizes Slight, Moderate and Severe?
Slight - up to 2mm
Moderate - 2mm to 4mm
Severe - 4mm to 10mm
Maximum deviation brick wall can be out of plumb for height of building?
25mm
Maximum deviation brick wall can be out of plumb over 2m?
Non Structural - 3mm
Structural - 5mm
Minimum perpend thickness?
5mm
Maximum deviation from specified or documented dimension?
15mm
Maximum deviation of wall out of plumb in a single storey?
10mm
Maximum brick overhang on a rebate?
15mm
Maximum a stump can be out of plumb?
Up to 1m - 10mm
Up to 2m - L/100
Greater than 2m - 20mm
Maximum amount you can pack under a bearer?
20mm
Allowed overhang of a tiled roof into a gutter?
35mm - 65mm
Allowed overhang of a tiled roof into a Sheet roof?
50mm - 65mm
Allowed vertical plumbness of a truss?
H/50 or 50mm, whichever is less.
A gutter is defective if it retains what depth of water?
10mm
Minimum gutter lap?
25mm and not in direction of flow
Who governs The Guide To Standards & Tolerances?
VBA
A crack in concrete is considered “severe” when crack exceeds what size?
4mm - 10mm
How far can a brick wall deviate from documented dimensions?
15mm
Vertical perp alignment is defective if it deviates by how much?
20mm over 2m
Maximum thickness of base bed of brickwork?
If exposed 20mm
If covered 40mm
Nominal thickness of brick beds and perps?
Beds - 10mm - + or - 3mm
Perps - 10mm + or - 5mm
What is the maximum tolerance in deviation of stair risers?
5mm from step to step over flight of stairs and not more than 10mm from smallest to largest
Roof overhangs into gutters?
Tiled roof - 35mm - 65mm
Sheet roof - 50mm - 65mm
When is a gutter deemed defective?
Gutter holds max 10mm water
It leaks
What is the minimum gutter overlap?
25mm
What is the maximum a wall can be out of plumb?
5mm over 1.8m