Plate Washers

Plate Washers are bearing plates that spread load under nuts, rods and tie assemblies. They sit between the fastener and the supporting surface at foundations, base plates and formwork.

At a glance

Plate Washers at a glance.

What it is

A bearing plate

A plate component that spreads load around a rod or under a mating nut.

Physical function

Distributes load on the face

Its footprint and opening seat the connected hardware against the supporting face.

Configuration

Plate geometry and finish

Square or rectangular plate; holed for rod or nut; multiple sizes to match mating hardware; plain, zinc-plated or galvanized finish.

Also known as

Plate Washers are referred to as bearing plate in the US, square plate washer in the UK, rondelle carrée in France, Ankerplatte in German-speaking markets, and rondella quadra in Italy.

United States: bearing plate
UK & Ireland: square plate washer
Australia & NZ: square washer
Français: rondelle carrée
Deutsch: Ankerplatte
Italiano: piastra di ripartizionerondella quadra

Trade names for the whole range

How it works

Spreads bearing under the nut

The rod passes through the washer opening. The Plate Washer seats against the base plate or form face, and the nut bears on the washer, distributing pressure.

Common applications

Where it is used.

Application

Foundation anchor assemblies

Spreads the nut load on the foundation surface at anchor connections.

Application

Base-plate connections

Distributes bearing area around threaded hardware at a base plate.

Application

Two-sided form tie bearing

Sits at the form face around a tie assembly and gives the nut a broad bearing surface.

What are plate washers called in different languages?

Plate Washers are also called bearing plates in the US, square plate washers in the UK, rondelle carrée in France, Ankerplatte in German, and rondella quadra in Italian. They are placed under nuts and bolts.

What finishes are plate washers available in?

Plate Washers are available in three finishes: black, zinc plated, and hot dip galvanized. They are positioned under anchor-bolt nuts and heads to distribute the bearing load on the bearing surface or form face.

Concrete systems

Load-spreading bearing plates

Plate Washers sit with Anchor Bolts at foundations and with Tie Rods and Tie Rod Nuts at form faces. They distribute bearing area around each connection.

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Technical specifications