Can stair brackets replace notched stringers?

Some adjustable bracket systems allow using unnotched stringers, which maintains the full structural depth of the 2x12. This can be stronger than traditional notched stringers.

Are stair brackets code-approved?

Many bracket systems have engineering approvals. Check the specific product for ICC-ES reports or engineering letters.

Stair BracketsGenerating image…

Stairs & Railings

Hardware

Budget: $2-$5 each (basic tread bracket) | Mid-range: $5-$12 each (adjustable stringer bracket) | Premium: $15-$30 each (heavy-duty or specialty)

Stair Brackets: Stringer Connectors & Mounting Hardware (2026)

Prepared by Lumberama's Building Materials Team

|Last updated May 25, 2026|Sources & methodology

Stair brackets are metal hardware used to support, connect, and adjust stair components. They include adjustable stair stringer brackets that eliminate notch-cutting, tread support brackets, and skirt board connectors. These simplify stair construction and can strengthen connections in both new and retrofit applications.

Key Features

Adjustable stringer brackets; Tread support angles; Skirt board connectors; Galvanized steel construction; Speeds up stair construction

Specifications

Types: adjustable stringer bracket

tread bracket

skirt connector | Material: galvanized steel | Capacity: varies by model | Fasteners: structural screws or carriage bolts | Adjustable: accommodates standard rise/run variations

Applications

Simplified deck stair construction; Interior stair stringer reinforcement; Tread support on unnotched stringers; Skirt board attachment; Repair and reinforcement of existing stairs

Installation Overview

For adjustable stringer brackets: attach bracket to stringer at desired rise/run angle. Fasten to stringer with structural screws. Set treads on bracket angles and secure. For tread brackets: screw L-bracket to stringer, set tread on bracket, screw through bracket into tread.

Pros & Cons

Pros

✓ Eliminates complex notch cutting; Speeds up stair construction; Maintains full stringer strength; Adjustable for varying rise and run

Cons

✗ Visible hardware on some applications; Added cost per connection; May not match all design aesthetics; Limited to manufacturer's angle range

Top Brands

Simpson Strong-Tie

USP Structural

Fast-Stairs

Code Requirements

Must meet load requirements for stair construction. Fasteners must be structural-rated. Stair geometry (rise, run) must still meet IRC R311.7 requirements. Not a substitute for proper stringer sizing.

Buying Tips

Adjustable stringer brackets can save hours of layout and cutting time; Use with structural screws for proper load capacity; Consider the Fast-Stairs system for deck stair projects where speed matters