Seniors, in particular, are susceptible to falls, with falls on stairs leading to 13 per cent of hospital visits. In recent years, falls and fall-related injuries have sent more Canadians to hospital than any other accident class ( 1 ). When notching the stringers, it’s important to remember that the cuts must leave at least 9 cm (3 1/2”) of solid wood (measured on the shortest distance between the corner of the cud and the flat of the wood opposite). (It can be as much as 1.2 metres or 47 1/4”, but only if the risers are part of the support system for the treads. It’s also worth noting that the distance between stringers has to be no more than 35 7/8” in residential settings. While Code allows stringers to be 1” wide if supported, this is exceptionally rare, and in most cases, builders will be content with 2x10 stringers even if supported. That’s because Code requires the uncut depth to be 23.5 cm (9 1/4”). When constructing stairs with wood, the stringers (that’s the diagonal stretch of wood the stair treads are connected to) must be 2x10 construction in most situations. If an exterior flight of stairs serving a secondary entrance has no more than three risers, a landing may be omitted at the top of the flight of stairs. If the door at the top of an interior set of stairs swing away from the stairway and
There are two exceptions where landings may be omitted: It should be noted that there is a slight relaxation for clearance when stairs run under beams or ductwork in a secondary suite – in this case, the clearance need only be 185 cm (72 5/8”) LandingsĪ landing is required at the top and bottom of each flight of interior and exterior stairs, including stairs in garages. Measure from here with a tape measure, taking care to keep the tape vertical. This can be done on-site by taking a board, and setting it so that it runs (diagonally) across the treads. Height is measured from the line running across the tops of the treads to any obstructions above. Required stair width, or 1.1m, whichever is less To start, here are some key dimensions to recall. Here's why: Increased tread depth can reduce fall risk, save lives) Now, 10" is the minimum run length (increased from 8.5" in NBC 2010. For non-residential structures, it’s best to call our office for guidance, as a number of factors come into play.Ĭhanges to note: NBC 2015 requires longer tread runs. The following outlines some of the dimensional requirements for stairs within a single-family home, or a single-family home with a basement suite.
0 kommentar(er)
