---
title: "Cavity webs"
url: https://formtechsys.com/CavityWebs/
description: "Cavity webs specification record: part number WEB04R with dimensions, coverage and size family."
published: 2026-08-17
updated: 2026-08-17
---

# Cavity webs

Published 2026-08-17

[Formtech](https://formtechsys.com/) › [Product reference](https://formtechsys.com/Products/) › Cavity webs

WEB04R

Component record for the cavity webs in the Formtech expanded polystyrene building system.

## Description

The 4-inch cavity web (WEB04R) is made with injection-molded polypropylene for strength and performance. Webs contain built-in rebar clips to hold the rebar in position, reducing the need for ties. Cavity webs slide and lock into place to join two Formtech panels, which creates a form. Four-inch webs come packaged in minimum quantities of 300 per box.

## Parameters

*Dimensional parameters*

| Field | Value |
|---|---|
| Part No. | WEB04R |
| Material | Injection-molded polypropylene |
| Packaging | Minimum 300 per box |

## Size family

- 4-inch cavity web
- 6-inch cavity web
- 8-inch cavity web
- 10-inch cavity web
- 12-inch cavity web
- WEBEX extension web