MGF Wall Bridge User Guide

MGF Wall Bridge

CREATING SAFE

WORKING ENVIRONMENTS

With over 40 years of experience, MGF is a privately-owned company whose primary focus is the provision of fully engineered excavation and structrual support solutions and complimentary lifting and safety equipment to the construction industry. We combine technical expertise
and operational performance to ensure the highest levels of customer service. With a focus
on developing and promoting industry best practice in excavation safety we aim to assist our customers in creating safe working environments for their employees.

CUSTOMER SERVICE AND SUPPORT
The hire and sale of our products is fully supported by our team of qualified engineers, experienced Technical Sales Representatives, hire desk and operational staff. Our hire centers provide the focal point for service delivery where our hire desk team will be pleased to receive your enquiry.

DELIVERY CAPABILITIES
Our dedicated fleet of vehicles offer a flexible solution to quickly meet our customers delivery needs throughout the UK. We partner with several global shipping companies to ensure we can quickly deliver our products on a global scale.

INTRODUCTION

The Wall Bridge is designed to facilitate transfer of personnel over high- level walls or obstacles, providing a temporary up – over – and down crossing point. It can be easily lifted into position, and re-located as required, to replace the expense of using scaffold towers and the associated fitting and moving costs.

FEATURES

• Adjustable leg positions to suit varying wall thickness
• Fine adjustment, fitting screws on one wall side only to facilitate fitting ease
• Optional door opening configurations (left or right hinged) – always open in
• Optional ladder pole configurations – poles can be fitted on left hand side or right hand side
• Secondary ladder lashing point with various positions
• Compatible with MGF wooden, GRP ladders leaning rung ladders as well as gangway ramps

SPECIFICATION

There are two types of MGF Wall Bridge:

• 4.390 = Original version introduced 2020
• 4.391 = Updated version with modified leg allowing mount on interlocked sheet piles and has our MGF Staircase connection integrated into the floor

UNIT DIMENSIONS: 4.390

SAFETY

IF YOU HAVE ANY QUESTIONS, CONTACT MGF

• Correct shoring and safety precautions must be in place if working below ground level
• Wear appropriate personal safety equipment including, but not limited to: hard hat, safety boots, safety glasses and gloves
• Ensure all safety gates are in place, orientated correctly and open inwards
• Only lift the Wall Bridge by its designated lifting points. DO NOT lift by lashing to any other points as this could cause damage, or failure
• Write a Lifting Plan, Risk Assessment and Method Statement prior to works, identifying safety procedures as deemed necessary by an experienced operator
• Be aware of overhead obstructions including power lines
• Ensure all bolts, pins and r-clips and ladder poles are securely fitted/tightened
• Inspect all components before the start of every shift
• Always provide suitable exclusion zones around the units during assembly and installation
• Always be aware of individual component weights and final assembly weights using adequate lifting equipment and good manual handling practices where appropriate
• Use suitably rated chains when lifting the item into position. Always use all four lifting points provided, and do not lift the item by any other features than its designated lift points
• Ensure the wall or item that the Wall Bridge is to be fitted to is sound and capable of supporting loads imposed by the equipment. MGF assume no responsibility for what this is fitted to or its structural integrity or capable strength. It is entirely the user’s responsibility
• If the Wall Bridge is not fitted to the wall (i.e. during storage, transport etc.) ensure the legs are adjusted to the widest setting A6/B6 to give it maximum stability and reduce the danger of toppling
• Ensure the location of the Wall Bridge allows clear access and ladder placement is not obstructed
• MGF recommend the Wall Bridge is used in conjunction with a suitable fall arrest system. MGF can supply various Davitsafe systems, please contact MGF for further details.

PARTS DESCRIPTION

4.391 CHASSIS LEG DETAIL

PRE INSTALL SETUP AND FITTING TO WALL

Prior to installing upon a wall or panel, it is best practice to configure and set all adjustments that are optional whilst on ground level.
LADDER POLES: Can be screwed in or out, and fitted on either side of the Wall Bridge to suit handing requirement. Turn clockwise to tighten / Anti-clockwise to undo. DO NOT strike to release poles.

CHECK POLES ARE SCREWED TIGHT BEFORE LIFTING INTO POSITION.

DOORS: Can also be configured to hinge from either side to suit requirement. Always orient doors to open inwards, and check configuration.

PRE-LIFT INTO POSITION FOR USE

• Check doors function fully and are adjusted so they do not foul at any point of articulation
• Check the stop plate contacts on the vertical tube post, preventing it from opening outwards
• Check all bolting is tight that secures door to vertical post

LEG SET UP

Wall Bridge can be configured to suit any wall or panel thickness from 80mm to 650mm.
Measure the thickness of the wall or panel that the leg is to be fitted to.
Refer to the recommended settings chart and look up the configuration that suits your thickness required.
Example: If fitting the Wall Bridge to a 400mm thick wall, either configuration A4/B3 – or – configuration A4/B4 would be acceptable. It is desired to keep
the Wall Bridge as centrally balanced as possible upon the wall to minimize loads into the wall.

With the item at ground level, lift the Wall Bridge using its lift point so it is 100mm clear of the floor and hanging freely.
Remove the 4 number course adjustment bolts, and place securely for re-use later.
Slide the ‘A’ side and ‘B’ side legs so the arrows align vertically to the recommended setting on the table. Once aligned correctly – refit the bolts and tighten securely.

Ensure the fine adjustment screws are fully un-done or retracted prior to lifting in place. This leaves the max gap available to fit over the wall.

FINAL PRE LIFT CHECKS

•  Ladder poles are in the desired orientation and are fitted tight
• Doors are configured as desired, fitted correctly and all bolting tight
• Legs are configured to suit wall thickness and are bolted tightly

Once above items are checked – lift the Wall Bridge into place, ensuring the fine adjustment screws are orientated towards the side of the wall that the fitter is on. Ensure a safe means of access is provided for this operation.
Ensure the frame is sat level and pulled tight to the wall on the ‘B’ side of the frame.
Tighten the fine adjustment screws until fit to the wall is complete. Tighten the bolts as tight as possible using the encapsulated spanner on each screw. The spanner can be easily re-positioned by sliding the spanner off the nut, rotating it to the desired position, slid back over the nut and re-tightened as required.

Re-check tightness of fine adjustment screws on a daily basis.
Once fitted to the wall, ladders can be installed, and lashed to pole and secondary lashing point.

REQUIRED CHECKS

Regular checks are required to ensure safe operation and continued safe use. DAILY:

•  Check Wall Bridge securing screws are tight to the wall, and that the wall surface looks sound and undamaged where fixed
• Check integrity of Wall Bridge
• Check all bolts are present and tight
• Check poles are tight
• Check secondary lashings are secure
• Check doors operate properly and are secure
• Check lift/tether points are undamaged and fit for use

REMOVAL

Removal is a reverse of fitting operation.

• Ensure any loose items are removed from the Wall Bridge
• Remove ladders. Ensure a safe means of access is provided
• Un-do the Wall Bridge securing screws and lift the Wall Bridge clear, then lower back to ground level using only the identified lift points on the Wall Bridge
• Before placing the Wall Bridge on the floor, or returning from hire, ensure the Wall Bridge is set to its maximum leg adjustment setting A6/B6. This is to make the Wall Bridge as stable as possible for storage and reduce danger of toppling over
• Ensure all items supplied with the Wall Bridge are returned to MGF post hire, otherwise charges will be made for replacement items

SHEET PILE/TRENCH SHEET INSTALLATIONS

Compatible with MGF sheet piles GU8N, GU13N, GU16N, GU21N, GU23N, PU28-1 and PU32-0.5.

• If installing on sheet piles 4.391 version must be used
• Minimum sheet pile upstand on the undug side is 500mm min
• Orientate the platform so the fine adjust screws are on the non-dig side of the excavation
• Position the platform so the two outer screws can contact on the pan face (see image below) – the rear central leg should bear upon the pan of the sheet profile on the excavated side

FOR INSTALLATION ON TRENCH SHEETS

Wall bridges 4.390 and 4.391 are not compatible with MGF standard, L8, or FKD 400-6, or KKD 600-6 sheet profiles.
The reason for incompatibility is because the sheet depth is below the Wall Bridge minimum jaw gap of 80mm.

Wall Bridge 4.391 is compatible with MGF KKD600-8, ER750-8, FLP600-6.
Sheet may require local doubling for stiffness where Wall Bridge connects. Contact the MGF design team if in doubt.

• If installing on sheet piles, only hire/supply the 4.391 variant
• Minimum sheet pile upstand on the undug side is 500mm min
• Orient the platform so the fine adjust screws are on the non-dig side of the excavation
• Position the platform along the wall so that at least one screw clamp, but preferably two screw clamps are engaged/clamped

INSTALLATIONS ON UN-CLUTCHED SHEET PILES

Both Wall Bridge platforms, 4.390 and 4.391 can be used on unclutched sheet piles, but due to install variances each case needs to be reviewed by an MGF Design engineer to check suitability prior to install.
Contact MGF design team for advice prior to hiring.
Note: Installations can be assisted by using a scaffold plank (on non-dig side) to bridge sheet profile gaps.
Minimum 80mm depth still applies due to the Wall Bridge jaw range.

INSTALLATIONS ON CURVED WALLS

It is possible to install 4.390 and 4.391 on curved walls (see picture on page 19 for installation on Manhole Ring).
Note: Due to curved shape some packing may be required to give a good fit and allow clamping to function. 4.391 platform has purpose-built screw holes on return legs to facilitate wooden blocks being screwed to the platform. All packing and fixings to be done by customer).
Contact the MGF design team for advice prior to hiring – re checking if fit is possible on specific radius and wall thickness.

COMPLIMENTARY MGF PRODUCTS

4.390 and 4.391 are both directly compatible with MGF gangway ramps 4.366.
These can be fitted at both ends of the Wall Bridge platform.
Up to three gangway ramps can be connected per side giving 1.5m max height climb – or 4.5m horizontally if used to clear poor ground conditions.
For detailed fitting instructions see Gangway Ramp user guide page 9.

4.391 can directly accept MGF stair systems, with its inbuilt floor level ‘slab connectors’
Both ends of the Wall Bridge platform have this facility.

Fixings required (per stair system/side of Wall Bridge):

• 4 off – M16x40 ISO4017 Hex Bolt – steel grade 8.8minimum (bright zinc plated)
• 4 off – M16 washer BS4320 from a – steel BZP
• 4 off – M16 Nylon Nut – grade 8.8 steel BZP

To fit bolts, orient Hex Bolt as shown in image above. Slide into the captive hole, orientating flats of bolt so they are held captive. Push bolt into hole and slide towards edge of platform where it is prevented from lifting out and cannot turn.

If using 4.390 Wall Bridge – Staircase can still be fitted – but additional bracket 4.389 is required to be fitted to the stair, this then allows the stair to be fitted onto the Gangway Ramp spigots. All Wall Bridge platforms have this facility fitted at both sides of platform (see image above).

UNIVERSAL LADDER SECURING CLAMP 4.3101

Universal Ladder Securing Clamp 4.3101 can be used to secure MGF ladders to ladder poles. Please see relevant user guide for details.

• MGF.CO.UK
• enquiries@mgf.co.uk

References

• MGF - Supplying Excavation and Structural Support Solutions

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