How to find the right Staircase Parts AI guide

Written by an AI model from its trained knowledge.

What the AI looks for in Staircase Parts

Stair geometry (US residential IRC): Riser no more than 7-3/4 in, tread depth at least 10 in, nosing 3/4 to 1-1/4 in where treads are under 11 in deep Replacement parts must keep the stair within code and consistent from step to step, because uneven steps cause trips.
Guard and handrail heights: Handrail 34 to 38 in above the nosing line; guards at least 36 in on open sides more than 30 in above the floor (IRC residential) These heights set newel length, baluster length and bracket placement, so decide them before ordering parts.
Rail system type: Choose either post-to-post (rail fits between newels) or over-the-post (rail runs over newels with fittings) and buy all parts for that system Newels, rails and fittings from the two systems do not interchange.
Baluster spacing: A 4 in sphere must not pass through any opening This is the child-safety rule that sets how many balusters each tread needs.
Species and finish matching: Buy rail, newel and treads in the same species (red oak, white oak, poplar for paint) from one line where possible Mixed species stain differently and the mismatch shows on a staircase.

LJ Smith: Major US stair-parts maker with a full system of rails, newels, balusters and fittings.
WM Coffman: Broad stair-parts catalog, including iron balusters and wood components.
Simpson Strong-Tie: Structural connectors, including stair tread angles.
Zoroufy: Decorative carpet stair rods and runner hardware.

Mixing parts from post-to-post and over-the-post systems
Ordering balusters or newels before measuring rake angle and rail height on site
Unbranded parts with no stated species or profile, which makes matching impossible later

Yes, but match the profile and species exactly. Handrail profiles in particular must match their fittings and existing rail.