As per the code specifications, the maximum vertical height of 147 inches (12 feet 3 inches) should be provided between landings or floor levels for a flight of stairs. Attic pull down stair hazards, basement hazards. Figure D-10 -- Angles for Stairs, Ramps, and Ladders. What codes apply to the provision of attic stairs, pull down stairs, or attic access hatches. Stairs Landing shall have a minimum live loading of 2.5 kPa and minimum point loading of 1.1 kN applied on 100mm × 100mm pad. Such headroom shall be continuous above the stairway to the point where the line intersects the landing below, one tread depth beyond the bottom riser. Stairways shall have a minimum headroom clearance of 80 inches (2032 mm) measured vertically from a line connecting the edge of the nosing’s. R 311.7.5.2. Attic Conversion Code and Regulations. 1009.7.2 Riser height and tread depth.

Build a new stairway Building permit and inspections to current Code Stair width ... 8 inches (except spiral stairs which may have headroom of 6 feet 6 inches). All of these measurements include the finished flooring, so don’t forget to take those thicknesses into account when planning your stair dimensions. Have a minimum headroom above spiral stair treads of at least 6 feet, 6 inches (2 m), measured from the leading edge of the tread; 1910.25(d)(4) Have a minimum tread depth of 7.5 inches (19 cm), measured at a point 12 inches (30 cm) from the narrower edge; Headroom Clearance (1) Except as provided by Sentences (2), (4) and (5), every exit shall have a clear height over the clear width of theexit of not less than 2 100 mm. Conventional or home-made stairways - defects. The tolerance between the largest and smallest riser height or between the largest and smallest tread depth shall … Treads shall have a minimum live loading of 2.5 kPa, or a 2.2 kN per linear metre or minimum point loading of 1.5 kN applied on 100mm ×100 mm pad on each step, whichever loading produces the more adverse effect. SECTION R311.5 STAIRWAYS . 1910.25(f)(5) Have a minimum tread width of 7 inches (18 cm), measured at the leading edge of the tread ( i.e. Have a minimum headroom above spiral stair treads of at least 6 feet, 6 inches (2 m), measured from the leading edge of the tread; 1910.25(d)(4) Have a minimum tread depth of 7.5 inches (19 cm), measured at a point 12 inches (30 cm) from the narrower edge; 1009.5 Headroom. Specifications for Stairway Overhead Clearance: Headroom. Here are three reference numbers for the codes pertaining to rise, run, and nosing in a straight run of stairs: R 311.7.5.1. R311.5.1 Width.

Lee Wallender . Stairway headroom should be => 6'8" over tread or landing. Stair tread depths shall be 11 inches (279 mm) minimum. Stair headroom height 08-17-2009, 08:05 PM The General Superintendent on the job site today insist that the height above the stairs is now a min of … Stairs cannot be continued without having a landing or floor level that breaks up the flight of stairs. Headroom for Stairs. 2 • STAIRS Landing 3' min Landing 3' min Inside Door swings in Outside Rise - 8" max Door 36" min. Stair balusters shall be spaced so a 4-inch object cannot pass between. above hanrai " l T d n The minimum clearance shall be maintained the full width of the stairway and landing. Stairways - 2015 IRC Section 311.7 R311.7.1 Width. Stairway headroom (=> 6'8" over tread or landing) Stairways shall have a minimum headroom clearance of 80 inches (2032 mm) measured vertically from a line connecting the edge of the nosings. Written by. BUILDING CODE INTERPRETATION Unless stated otherwise, all Code references in this STANDATA are to Division B of the Alberta Building Code 2006.