Modular formwork ParaTop

bridgesteelmetal

Product overview
Doka ParaTop transforms the Top 50 large-area formwork into a ground-support-free cantilever arm formwork that is operated entirely from above. The system's innovative insert-shoe simplifies installation and compensates for positioning tolerances.

Versatile

• Attachable to concrete or steel bridge superstructures using two insert-shoe types.
• Adaptable to different cantilever cross-sections using modular Top 50 components.
• Bracket spacing is independent of shear-connector centres and avoids collisions with stiffening plates within the permitted influence width.

Less equipment and erection work needed

• All operations (setup, alignment, reinforcement, concreting, striking) are performed from the superstructure—no platforms or scaffolds beneath required.
• Large influence widths reduce the number of bracket planes required.
• Hard chrome-plated insert-cones simplify formwork removal; mounting sleeves are not needed.

Fast construction progress

• Simple assembly sequence with only three ParaTop components: insert-shoe, insert-channel, insert-cone.
• Bolted joints shorten erection and dismantling times compared with threaded connections.
• Insert-shoes can be mounted ahead of time to accelerate sequence.
• Open-front insert-shoes reduce crane time by avoiding laborious threading of tie-rods during hanging.

Attachment and application
The ParaTop cantilever formwork is fixed to the bridge superstructure using re-usable diagonal anchors. It is suitable for steel-composite and precast concrete bridges and is designed for complete operation from above while compensating installation inaccuracies via the insert-shoe.

References (examples)

• Västlänken
• Randselva Bridge
• Bridge Junglinster

Technical specifications

• Type: ground-support-free cantilever arm formwork for bridges (steel-composite and precast concrete).
• Operation: entirely from above (no under-structure scaffolding required).
• Compatibility: modular Top 50 components.
• Main components: insert-shoe, insert-channel, insert-cone.
• Insert-shoe: two types to suit concrete or steel superstructures; compensates installation tolerances.
• Bracket spacing: flexible within permitted influence width; independent of shear-connector centres.
• Attachment: re-usable diagonal anchors to the bridge superstructure.
• Insert-cones: hard chrome-plated for easy removal; mount-ahead facility for insert-shoes.
• Erection: bolted joints for shorter erection/dismantling times; open-front insert-shoes reduce crane/tie-rod handling.