Altrex MHB 60 Manuel page 19

6. Mount the shock-absorber arm to the shock-absorber adaptor. Mount the counterweight holder to this. Both are mounted
with a locking pin. Secure this with the red quick-clip.
7. For ADB600 HIGH only: mount x2 diagonal braces between the outer beam and the trestle (front trestle+rear trestle). Use
2 locking pins for each diagonal brace. Secure them with the red quick-clip.
8. Raise the roof beams to the correct position and lock the wheel brakes. Ensure that the wheels are positioned on wheel
plates or channels before distributing the load on the roof and moving the roof beams.
9. Put the counterweights on the counterweight holder and secure them with the steel pin + padlock to prevent removal by
third parties. For the correct number of weights: see the load table in appendix T5.
10. Click the locked hooks on the hoisting cable and the safety cable to the shock-absorber arm. Thread the cable ends
several metres through the end of the front beam. Ensure that the cables run over the cable sheaves, and that they are
hanging freely and are no longer able to become entangled.
The cables may not be mounted until all the counterweights have been mounted!"
11. Slowly lower the cables to ground level where the suspended platform is located.
12. Mount the highest position plaat to the steel cables as specified in the hoist manufacturer instructions.
13. After making sure that all roof beam parts have been separately checked for completeness and correct assembly, the roof
beam is ready for use.
8.3.2 ADB 800 (LOW and HIGH)
1. Assemble the outer beam, with the inner beam inserted in the outerbeam, to the desired length ('support distance A: 4,5m,
5,0m of 5,5m). Secure the beams with locking pins and lock them using the red quick-pin.
2. Mount the scaffold to the front trestle using the 2 locking pins. Secure the pins with the red quick-pin.
3. For ADB 800 HIGH only:
- Mount x2 extension trestles on the front trestle with locking pins. Secure the pins with the red quick-pin.
- Mount x2 diagonal braces between the front trestle and the trestle extender using 2 locking pins. Secure the pins
with the red quick-pin.
4. Slide the outer beam into the front trestle, until the 1st locking hole in the beam is aligned with the locking hole in the front
trestle. Secure the front beam and the front trestle with a locking pin. Secure the pin with a red quick-pin.
5. Slide the front beam in the scaffoled to the desired outreach (Outreach B). Secure the front beam and scaffold with a
locking pin. Secure the pin with the red quick-pin.
6. Slide the outer beam into the rear trestle, until the 1st locking hole on the beam is aligned with the locking hole on the rear
trestle.
7. Slide the shock-absorber adaptor into the outer beam. Secure the shock-absorber adaptor, rear trestle and outer beam
with a locking pin. Secure the locking pin with the red quick-pin.
8. Mount the shock-absorber arm to the shock-absorber adaptor. Mount the counterweight holder to this. Both are mounted
with a locking pin. Secure this with the red quick-clip.
9. For ADB800 HIGH only: mount x2 diagonal braces between the outer beam and the trestle (front trestle+rear trestle). Use
2 locking pins for each diagonal brace. Secure them with the red quick-clip.
10. Mount the chain tensioner fully to the scaffold and shock-absorber adaptor using 2 locking pens and secure them. Now
adjust the chain to the correct tension using the links on the chain and the locking pin.
11. Raise the roof beams to the correct position and lock the wheel brakes. Ensure that the wheels are positioned on wheel
plates or channels before distributing the load on the roof and moving the roof beams.
12. Put the counterweights on the counterweight holder and secure them with the steel pin + padlock to prevent removal by
third parties. For the correct number of weights: see the load table in appendix T5.
13. Click the locked hooks on the hoisting cable and the safety cable to the shock-absorber arm. Thread the cable ends
several metres through the end of the front beam. Ensure that the cables run over the cable sheaves, and that they are
hanging freely and are no longer able to become entangled.
The cables may not be mounted until all the counterweights have been mounted!"
14. Slowly lower the cables to ground level where the suspended platform is located.
15. Mount the highest position plaat to the steel cables as specified in the hoist manufacturer instructions.
16. After making sure that all roof beam parts have been separately checked for completeness and correct assembly, the roof
beam is ready for use.
8.4 Positioning the roof beam
1. Before positioning the roof beam, the steel cables must be checked to ensure they are not bearing any weight (suspended
platform is on the ground) and the cables have sufficient slack. Preferably, pull the steel cables out of the hoists.
2. Ensure that the power cable is disconnected from the power supply.
3. Check whether the roof structure on which the roof beam is being positioned is strong enough. Preferably, place wheel
plates or channels.
4. If necessary, the counterweights can be temporarily removed.
5. Move the roof beams to the correct position and check that the distance between them is equal to the distance between
the hoists.
6. Lock the wheel brakes.
7. Position and lock the counterweightsif they have been removed and reconnect the power supply.
8. Check to ensure that the hoists are positioned directly above the roof beams.
9. Check to ensure that the temporary suspended platofrm system still complies with all the instructions.
8.5 End of work and disassembly
- After the work has ended, the steel cables must be disassembled first, before counterweights or other components of the
suspended platform system may be dismantled.
- The roof beam is disassembled in reverse order to assembly.
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