Stairs Function Common stairway Private stairway provide safe, easy walking access between levels Common stairway In public buildings In building used by more than one family Private stairway In buildings intended solely for use by one family

Definitions Stairway Includes stairs, landings balconies forming part of the stairway Flight The part of a stairway or ramp between landings

Stair types Straight Flight

Straight Flight with Winders at the top

Quarter space landing Quarter space landing

Elevation Dog-leg stair with Half-space landing Plan

hand rail string newel post

Nosing 16mm min Pitch line Going 220mm min Rise 220mm max Pitch 420 max

Landings Landing width not less than 800mm or width of stairway Or whichever is greater.

Landing at bottom of stairs at Least 400mm clear of door swing

Regulations Guarding Ensure that a 100mm Diameter sphere cannot Pass through any opening In the balustrade or guarding

Balustrade

Handrail Handrail 840-900mm Measured vertically Above the pitch line Pitch line

Headroom 1.5 m measured Perpendicular to the pitch line Headroom 2 m Measured vertically Above the pitch line Pitch line

1.8 Min – short flights only Danger Zone 1.8 Min – short flights only

Partition Possible cupboard space Stud Shelf Trimmer Void Headroom Decking Plaster board soffit Joist bearer Stair pitch Trimmer

Handrail morticd And housed into Newel post 100 x 100 Newel post Top tread rebated Over trimmer Upper floor landing 150 x 75mm trimmer String housed and Morticed into newel

Top tread rebated Over trimmer Upper floor landing 150 x 75mm trimmer

Calculations for threads and risers. Commonly used measurements: Thread = 220 mm Riser = 175 mm The above measurements may vary slightly from building to building, as long as the satisfy the following formula: G + 2R = 550mm – 700m G = Going (Thread) R = Riser