Load paths, openings, headroom and the geometry of a plan.
Two metres of clear headroom measured vertically from the pitch line of the stair, and 1.9 metres at the lowest point over a sloping ceiling, with...
Nicole BickleyYes, 300mm is a realistic lowering depth, but it is a structural operation rather than an excavation: the existing foundations have to be underpinned in sequenced...
Nicole BickleyA 5mm step between adjoining floor finishes is acceptable and unnoticed; 15mm is a trip hazard at a threshold; 20mm or more needs a ramped transition...
Nicole BickleyA main hallway needs 1,200mm clear width for comfortable two-way movement, 1,000mm as a working minimum, and 900mm where it is a secondary route. Below 900mm...
Nicole BickleyPlan the falls first, then the floor level, then the finished ceiling height, because the drain has to fall at 1 in 40 to 1 in...
Nicole BickleyThe size is calculated, not chosen: it depends on the span, the load above, the bearing points and the deflection limit, and a typical domestic opening...
Nicole BickleyYou cannot know from knocking on it, and you should not decide from a guess. The reliable signals are the direction of the floor joists above,...
Nicole Bickley
