Railing Basics: Height, Spacing and Posts Done Right
Resource guide | 7 min read

Railing Basics: Height, Spacing and Posts Done Right

The key ideas behind a safe handrail or guardrail: post anchoring, baluster spacing, rail height and the finish that protects it.

Handrails and guardrails

A handrail is something you grip while using stairs. A guardrail keeps people from falling off an edge. Some railings do both. Each has requirements for height, strength and spacing that local codes spell out.

Post anchoring

The post connection is the weak point of most railings. Posts can be set into concrete, bolted through a base plate to concrete or fastened to framing. The method depends on the surface, and poor anchoring leads to wobble.

Baluster spacing

Gaps between balusters need to be small enough to keep children from slipping through. Local rules give maximum openings, and we build to the requirement you provide.

Rail height and shape

Rails should sit at a comfortable height and be easy to grip. Round or oval tube sits well in the hand. Returns at the ends prevent clothing from catching.

Materials and finish

Steel is strong and can be painted, powder coated or galvanized. Outdoor railings need weather protection at every joint and weld, especially at the base.

Testing and inspection

Push firmly along the rail and on each post. Anything that moves, flexes or shows rust at the base needs repair. Test railings at least yearly and after storms.

Our advice in one sentence

Anchor the posts well, check the spacing and test every railing at least once a year.

Questions

Quick answers.

Do I need a permit for a new railing?

Often. Check with your local building office, since rules vary.

Can I attach a railing to wood framing?

Often, with correct fasteners and blocking. We assess each situation.

How tall should a railing be?

Heights vary with use and local rules. We build to the requirement you provide.

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