Stair Stringers for Outdoor Steps and Stair Construction

Stair stringers are an essential structural component in the construction of outdoor stairs, supporting the treads and helping create safe, stable access between different levels. At WBS Henderson, the stair stringer range includes precision-routered radiata pine stringers designed for decks, retaining walls, garden paths, entrances, and landscaping projects throughout Auckland and New Zealand.

H4 Treated Radiata Pine Stair Stringers

The range consists of dressed radiata pine stair stringers manufactured from H4 CCA-treated timber. H4 treatment is designed for exterior applications where timber is exposed to weather and ground moisture, making these stringers suitable for outdoor environments. The timber is kiln dried and dressing grade, helping to provide improved dimensional stability and a cleaner finish for completed projects.

Available options include standard 200mm x 50mm routered stair stringers held in stock from 1-step through to 10-step configurations, with larger 250mm x 50mm stringers and higher-rise options available as special orders. Rise heights range from approximately 350mm through to over 2 metres, providing solutions for both small landscaping steps and larger access stairways.

Stair Stringer Options and Sizes

Pre-routered stair stringers are designed to simplify installation by providing accurately cut locations for stair treads. The range includes various step counts and rise heights, allowing builders and DIY renovators to select a suitable option for their project requirements.

These stringers are supplied ready for tread installation, making them ideal for pairing with timber decking boards or other suitable stair tread materials. Their consistent sizing helps achieve a professional finish while reducing on-site cutting and layout work.

Applications for Stair Stringers

Stair stringers are commonly used in residential and light commercial projects, including:

• Deck access stairs
• Garden and landscape steps
• Retaining wall accessways
• Elevated entrances
• Outdoor walkways
• Renovation and extension projects

Their treated construction makes them particularly suitable for exposed outdoor environments where long-term durability is important.

Choosing the Right Stair Stringers

When selecting stair stringers, it is important to consider the total rise height, number of steps required, stair width, tread material, and intended use. Larger rises may require higher-capacity stringers or custom configurations, while wider staircases may require additional stringers for adequate support. Matching the stringer size and step configuration to the project helps ensure a safe and durable staircase.

WBS Henderson supplies stair stringers for both trade professionals and DIY customers, with stock available from its Auckland timber yard and access to special-order sizes for larger or custom stair projects.