LiftedDisco
Member
- Messages
- 122
- Location
- Towcester, UK
As @BrokenBiker has run through, the tandem lifts are done as a Contract Lift with an AP co-ordinating the lift.
Ours were relatively simple - by and large it was a case of taking the load just off the ground jacks (we used to build the roof canopy at ground level on 0.5m jacks, thereby avoiding a significant element of working at height), then ensure all matched the plan. The roof canopy had exposed structural nodes - four soft strops around the nodes at stipulated locations, then slung from the hook.
Take the load to 2m, then check the columns were OK (pinned to the underside of the columns), then lift to 6.1m (or 9.1m depending on the height of the finished structure and side wall required), so that all columns hang free. Each crane then lowers in sequence to allow columns to be quick pinned to base plates that had been bolted down. Once all columns are pinned, install cross bracing, check columns for line and level, then release the crane and check stability.
All being well, release the crane. Rinse and repeat as required….
Ours were relatively simple - by and large it was a case of taking the load just off the ground jacks (we used to build the roof canopy at ground level on 0.5m jacks, thereby avoiding a significant element of working at height), then ensure all matched the plan. The roof canopy had exposed structural nodes - four soft strops around the nodes at stipulated locations, then slung from the hook.
Take the load to 2m, then check the columns were OK (pinned to the underside of the columns), then lift to 6.1m (or 9.1m depending on the height of the finished structure and side wall required), so that all columns hang free. Each crane then lowers in sequence to allow columns to be quick pinned to base plates that had been bolted down. Once all columns are pinned, install cross bracing, check columns for line and level, then release the crane and check stability.
All being well, release the crane. Rinse and repeat as required….
