Cullen Technical Guide 2025

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HRS Head Restraint Screw

NEW

The HRS is used for securing non-load bearing partitions to the floor structure and provides lateral restraint to the panel.

Features & Benefits — Allows for joist/truss deflection​ — Reduces plasterboard cracking and fixing defects

— Screw design reduces squeaks​ — Plasterboard can be pre-installed​ — Guide to support installation​

— Requires no pre-drilling Material Specification

In Situ

— Carbon steel screw​ — PA recyclable guide Approvals — Meets NHBC Technical requirements

Dimensions (mm)

100

30

Load Data

Characteristic lateral load capacity per fixing (kN)

Maximum Gap Between (mm)

Product Code

Partition and joist or Partition and plasterboard (15mm max plasterboard)

Timber frame partition (C16min grade) - attached to engineerred joist

Code

Description

Box Qty

546496

15

1

546496

PSTS 6.5 x 100 + Guide

100

Installation Instructions - Plasterboard pre-installed *Drive the screw until the thread is fully embedded in the joist ​

*Install HRS at 1200mm centres maximum and ensure minimum of 2 HRS’s per partition, recommended edge distance of 200 mm​

1

2

3

4

5

Drive the screw up (do not overdrive the screw)​

Position the guide against the partition header

Partially drive the screw vertically into the header

Remove the guide​

Insert a screw into the guide

The latest most up to date version will always be online and not in print or in downloaded pdf.

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Technical support 01592 771132 / technical@itwcp.com / https://www.itwcp-offsite.co.uk

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