Dokaflex 124 Soffit Support System

Dokaflex 124 is a soffit and slab formwork system for soffit construction and suspended slabs up to 30cm thick. It is a hand-set timber-beam falsework: props stand on the floor, primary and secondary beams sit on top, and the formwork face goes on the beams to carry the wet concrete.

Using Dokaflex for your soffit formwork gives you a lightweight but capable system. Typical applications include:

• Suspended floor slabs
• Basement and podium slabs
• Bridge decks
• Floor slabs in apartments and offices
• Hotels and high-rise frames
• Downstand and ground beams

How the 1-2-4 system works

The 1-2-4 in the name is the system itself. Triangular marks along the timber beams act as a built-in measuring tape, so the layout can be set out by eye and without a tape measure.

• 1 mark is the maximum spacing of the secondary beams
• 2 marks is the maximum spacing of the props
• 4 marks is the maximum spacing of the primary beams

Work to the marks and a quick visual check tells you the system has been set up correctly. With only two beam lengths in the kit, there is little to sort through on site.

Adapting Dokaflex to different slab layouts

The timber beams telescope, so the system flexes to the layout rather than the other way round. Downstand beams and floor extensions are handled within the system, and the beams close up neatly against columns and shear walls. The same kit optimises for different slab thicknesses and can shore filigree (precast) slabs. The beams take any form face you desire, so you get a first-rate concrete surface finish.

The Dokaflex kit

A few hard-wearing parts make up the system:

• Doka H20 timber beams — a built-in shock absorber and ends sealed around the web, so they take the knocks of hire and resist moisture and UV
• Eurex floor props — at least 20 to 30kN to EN 1065 Class D/E, light enough to set by hand
• Lowering heads — strike the system with a hammer blow, no crane needed
• 4-way heads — carry single or twinned beams depending on orientation
• Folding tripods — hold the props upright and stable while you build

Temporary works design for Dokaflex slabs

Slab falsework is temporary works. Under BS5975 and the CDM Regulations, your temporary works coordinator needs it designed and checked by a competent engineer before the pour, and the beam marks alone do not cover columns, edge loads, back-propping or when it is safe to strike.

SEL's in-house Civil and Structural Engineers produce that temporary works design: prop layout, beam spacings, loadings and the striking sequence, all to BS5975 and issued with the calculations and drawings your TWC signs off.

Common Questions

Hire Dokaflex 124

To find out more about our Dokaflex 124 soffit support system and get latest rates, please contact our nearest depot.