The ground-support-free cantilever arm formwork for steel-composite and pre-cast concrete bridges
Doka bridge formwork ParaTop turns Large-area formwork Top 50 into a cantilever arm formwork that can be operated completely from above. The system's innovative insert-shoe makes it easy to erect, and compensates for any installation inaccuracy.
thanks to modular system concept
can be fixed to either concrete or steel superstructures (2 separate types of insert-shoe)
can easily be adapted to different cross-sections of cantilever slab with components from the modular Top 50 'kit'
does not collide with stiffening plates and is independent of shear-connector centres, as any bracket spacing can be selected within the permitted influence width
Less equipment and erection-work needed
as all work is carried out from the superstructure
there are no platforms or scaffolds beneath the superstructure, and formwork set-up & alignment, reinforcing, pouring and striking are all done only from above
the large influence widths of the brackets mean there are fewer bracket planes
formwork removal is made easy by the hard chrome-plated insert-cones, with no need for mounting-sleeves
Fast construction progress
assured by optimised system design
the assembly sequence is easy to understand, with only three ParaTop system components (insert-shoe, insert-channel, insert-cone)
erection and dismantling times are shortened by using bolted instead of threaded joints
'mount-ahead' facility for insert-shoes
hanging the cantilever arm formwork into place does not take much crane-time – there is no need to laboriously thread in tie-rods, as the insert-shoes are open at the front
This versatile cantilever arm formwork is attached to the bridge superstructure by means of re-useable diagonal anchors.