KingFlor® SlimDek 210®

Edge Infill/End Diaphragms

Galvanised steel edge diaphragms for the SlimDek 210® profile are installed prior to laying the sheets when using the SlimFlor® system. The end diaphragm aligns with the edge of the lower flange of the beam and aids in achieving the beams fire rating including fixings.

Laying SlimDek 210®

1. Place the SlimDek 210® sheets on the asymmetric beam or beam fitted with an additional bottom flange seating plate ensuring minimum 50mm bearing is achieved. In the situation where SlimDek 210® is supported by a brick or masonry wall, a separating strip such as Malthoid is recommended.
2. Engage subsequent sheets of SlimDek 210® by locking the larger female rib over the male rib as shown.
3. Once engaged, the SlimDek 210® side laps are to be stitched at 500mm with 10-16 Tek screws.

Fasteners and Locations

The decking must be positively fixed to the supporting floor beam or wall, with a diaphragm, in order to avoid movement and excessive deflection during the pouring of concrete. When fixing to a steel support structure, shot fired pins or self drilling/tapping fasteners should be used with the diaphragm. Provide one fixing at each diaphragm at every sheet plus two fasteners in the top of the SlimDek 210® sheet to the diaphragm. In the case of other support systems, such as brickwork, blockwork and concrete, the SlimDek 210® must be fixed using pre drilled holes and self tapping fixings suitable for masonry or concrete. A diaphragm must be used at all supports for the Slimdek 210® sheeting to be supported on.

Temporary Propping

If temporary propping is required [refer to the quick reference tables on the back page], they should be placed at the correct centres prior to laying the SlimDek 210® sheets. Generally timber or steel bearers with a minimum dimension of 100mm x 100mm are used on vertical props. The props should be installed so as to prevent settlement during loading by wet concrete and other construction loads. Temporary props should only be removed after the slab has reached sufficient strength [at least 75% of the specified 28 day strength]. The full design load may only be applied once the slab has achieved its 28 day strength.

Reinforcement

Place all reinforcement in strict accordance with the Structural Engineers drawings and specification. The decking becomes part of the slab reinforcement with the remainder formed by a bar in each decking trough and a mesh placed near the slab top. Normally, circular plastic spacers position the bars 70mm from the base of the trough. This distance can increase to 90 or 120mm respectively when 90 or 120 minutes fire resistance is required.

Concrete Placement

The specified grade of concrete and any chemical admixtures must be in strict accordance with AS3600 and the Structural Engineers drawings and specification. The deck must be clear of any excess dirt, grease or debris as this inhibits bonding between the deck and concrete. Ensure that concrete is applied evenly over the decking surface, as mounding of the wet concrete will cause excessive local loading.