Simpson Strong-Tie PBWS Folded postbase

Innovative Timber-to-Concrete Connector with Reduced Environmental Impact

The Simpson Strong-Tie PBWS Folded Post Base is a one-piece, non-welded solution for connecting timber posts to concrete. Engineered to reduce steel usage by up to 45% without compromising load-bearing performance, this post base offers a sustainable, durable, and corrosion-resistant choice for outdoor timber structures.

Key Features

• Single-Piece Folded Design: No welds, reducing material stress points and simplifying production

• ZPRO Coating: Advanced corrosion protection equivalent to hot-dip galvanising (C3 rating – EN ISO 12944) with a cleaner, more refined finish

• Eco-Friendly Engineering: Uses significantly less steel than traditional post bases, lowering carbon footprint and improving handling

• Flexible Fastening: Can be installed using either 4 x CSA connector screws or 2 x SSH hex head screws—no pre-drilling required

Material Specification

• Steel Grade: S250GD

• Corrosion Protection: ZPRO coating, equivalent to ~55μm zinc layer

• Finish: Shiny and neat aesthetic with structural-grade weather resistance

Technical Data Sheet

Product Details

Images

PBWS post installation using 4 x CSA connector screws.

PBWS post installation using 2 x SSH hex head screws.

PBWS beam installation.

Applications

• Designed for connecting solid timber or glulam posts to concrete bases

• Ideal for a wide range of outdoor timber projects, including:

  • Pergolas

  • Decking

  • Porches

  • Car ports

  • Garden structures

  • Sheds

Suitable Connections

• Supporting Member: Concrete

• Supported Member: Solid timber, Glulam

Installation Options

• Fasten to timber using:

  • 4 x CSA connector screws, or

  • 2 x SSH hex head screws

• Compatible with standard concrete anchors for base fixing

• No pre-drilling required, reducing install time and labour

Advantages

• Lightweight & Easy to Handle

• Engineered for Strength with Less Material

• Enhanced Lifespan in Outdoor Conditions

• Cost-Effective Alternative to Stainless Steel

Important Notes

• Not recommended for use where the post top is unrestrained, such as free-standing fence posts

• Always follow local building codes and engineering recommendations for load-bearing structures