Single Width Tower Assembly Guide - Lewis SW (Single Width) Aluminium Tower - 3T (Through the Trap) Method

Nov 2, 2026

Complete assembly guide for the Lewis SW (Single Width) Aluminium Tower using the 3T (Through the Trap) method. Covers requirements for personnel and PPE, safe working loads per platform (275kg) and maximum per tower (up to 950kg), inspection checks for castings, welds, tubes/braces/rungs, platforms and castors, and rules for manoeuvring, levelling, deployment of outriggers and stabilisers. Includes wind-scale limits for when to work, stop work, and dismantle, plus guidance on safe climbing and tool loading during erection and dismantling.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages20

Reading Time50 min

AccessFree to download

Single Width Tower Assembly Guide

Safety and personal protection requirements

Component inspection and operating limits

Manoeuvring, levelling and outriggers

Wind conditions: OK to work, stop, dismantle

Internal and external use scope

Assembly steps (1.1 - 1.12)

Unit 1 Bellingham Trading Estate Franthorne Way London SE6 3BX T: 0845 257 599 E: [info@scaffold-tower.co.uk](info@scaffold-tower.co.uk) W: [www.scaffold-tower.co.uk](www.scaffold-tower.co.uk) Single Width Tower Assembly Guide Single Width Tower Assembly Guide This document will provide all users of Lewis Access Towers with a complete guide to the erection of the Lewis SW (Single Width) Aluminium Tower, employing the 3T (Through the Trap) method. The user should read the entire contents of this document before commencing assembly and pay particular attention to all of the safety instructions. If the equipment is passed onto another party a copy of these instructions should accompany the handover. Two persons are necessary to carry out the erection of the equipment detailed in this document. It is strongly recommended that the following items of personal protection equipment be worn at all times: safety boots (EN345 or BS1870 / 4972); safety helmet (EN397 or BS5240); gloves. The SWL (Safe Working Load) for each platform is 275kg, evenly dispersed. Additional items, such as steps or conventional ladders, must never be used to gain further height from the platform. The tower must be climbed from within the structure, on no occasions should the tower be scaled from the outside. Inspect all the tower components before each use. Pay particular attention to; z Castings-check for cracks z Welds-free from cracks z Tubes/Braces/Rungs-Straight and with indents less than 5mm deep z Platforms-no damage, free from debris z Castors-moves freely, threads free from damage, brake working z Outriggers-straight, feet flat z Inspect the equipment for damage regularly, at least daily. The Lewis Tower is a Class 3 Industrial Tower System The tower should be manoeuvred into position by hand by pushing it from the base frame. Never attempt to use any mechanical equipment (i.e. a forklift etc.) to move the tower. If it is necessary to lift individual components whilst assembling the tower, a dependable knot should fasten each item. Be aware of overhead obstructions – pay particular attention to any live electrical cables. Ensure that no persons, materials or tools are on the tower when it is being moved. Additional care should be taken when moving the tower on uneven or inclining ground. The use of the castor locks should be deployed when the tower is in position. When moving the tower the stabilisers should only be lifted 35mm from ground level. Towers under 4m in height are the only towers that should be moved. z Check all components (see component list) are available and in usable condition. z Damaged or incorrect components should not be used. z If damage should occur whilst in use, stop work immediately and isolate the damaged items from the rest of the tower and contact your supplier. z Check the ground on which the tower is to be used is relatively flat, smooth and capable of supporting the tower. z The SWL (Safe Working Load) of the tower is 275kg per platform, inc the weight of the tower-evenly distributed, up to a maximum of 950kgs per tower. z Do not exceed the SWL. z Never attach safety harnesses or similar safety equipment to the tower whilst erecting or dismantling the tower. z During assembly, the tower should only be climbed from inside of the frame dimensions, do not scale the tower from the outside. z Tools and equipment must be loaded onto the platform within the confines of the tower dimensions. z Adjustable legs are to be used for levelling. z Outriggers should always be deployed when required. If the area of operation means that the outriggers cannot be deployed in the recommended position – contact Lewis Towers or your supplier for advice. Working on the Tower-The Beaufort Windscale Scale 4. 13-18 mph ....................................................................................... OK TO WORK ON TOWER Moderate Breeze: Raises dust, loose paper; moves

FAQs

How many people are needed to assemble the Lewis SW tower and what PPE is recommended?

Two persons are necessary. Always wear safety boots, a safety helmet, and gloves.

What are the safe working load limits for each platform and for the whole tower?

Each platform has an SWL of 275kg, evenly dispersed. The maximum is up to 950kg per tower, including the tower weight, evenly distributed.

What wind conditions determine whether it is OK to work on the tower, stop work, or dismantle it?

Scale 4 (13–18 mph) is OK to work. Scale 5 (19–24 mph) requires stopping work. Scale 6 (25–31 mph) requires dismantling the tower.

Nov 2, 2026

Uploaded by I feel Different