Intumescent Letterbox Liner Systems
Trade Name:
ASTRO ECO TELESCOPIC LETTER BOX FX

Introduction

The purpose of this document is to give guidance to approved contractors and suppliers who are engaged in the fire stopping of service penetrations in walls and doors using the Astro Eco Telescopic Letter Box System FX. All service holes through floors and compartment walls must be fire stopped to prevent the passage of fire, smoke and hot gases. The key points for intumescent passive fire protection products are :-

• Prevent the spread of fire, smoke and hot gases through a building by containing it in the compartment of origin.
• Maintain the integrity of escape routes from a building.
• Reduce loss or damage to property from the effect of fire and smoke.
• Maintain pressure differential between compartments and ventilation channels.

The Astro Eco Telescopic Letterbox FX

The Astroflame telescopic letter box system range is specially designed to increase the safety and security of occupants against fire.

The range includes models which are fire & smoke rated for 30 minutes. Where relevant, particularly for multiple occupancy residential buildings, letterboxes have been fire tested to BS 476 PART 22 & 31.1 for 30 minutes fire & smoke rating.

Installation

Please note that the maximum tested height from the floor to the letterbox is 1050mm to stay within the tested criteria.

The letterboxes are adjustable to suit door thickness of 40mm - 65mm for 30 minute rated doors only. Fixing screws supplied

To install

1 Cut either a 235mm x 50mm aperture or 274mm x 57mm for the commercial range at your selected position on the door or solid wall

2 Insert letter plate sections through each side of the door or aperture, ensuring that they correctly engage together.

3 Secure letterbox to door or aperture using screws supplied.

4 To maintain integrity, ensure gaps between letterbox and door or aperture are sealed using intumescent sealant.

Compliance

Astro Eco Telescopic Letter Box FX is manufactured in the EU, meeting the highest quality standard in compliance with ISO EN 9001:2000 . For fire test certification contact Astroflame Fireseals technical department.

Fire Test or Assessment Reports

Tested to BS 476 PART 22 for 30 minutes fire rating

Storage and disposal

Astro Eco Telescopic Letter Box FX should be stored indoors. No shelf life is given as this product will not deteriorate in storage.For additional testing, certification or technical information please contact

ASTROFLAME FIRESEALS LTD.Issue 04/08