Area of use



TSS – (Terrasso Stair Support).

Inner tubes are pulled out with wire and return rope (no visible marks on the surface, suitable for terrace surfaces).


RVK – (Repos  Vegg Konsollfritt (Repos Wall Consoll free)). 

Inner tubes are pushed out by hand / tools from top of repos (casting visible in surface)


A purpose-designed ‘left-in’ component for easy forming of recesses in concrete walls (precast or insitu). Suitably sized to complement the sliding inner-sections of standard TSS & RVK Telescopic Connectors (all load ranges) prior to receiving cementitious grout-fill. Its design provides +/- 35mm (min) vertical tolerance and +/- 40mm (min) horizontally. The REDiBOX Permanent Recess Former is manufactured from durable and environmentally recyclable HDPE.

The embedded box element is heavily ribbed on all sides, comprehensively anchoring it into the concrete wall. The rear of the detachable face-plate has an inset perimeter rib, which provides a close fit to the box and which also maintains the shape of the recess former under concrete pressure. The unit is fully sealed, which ensures that the recess will be clean once the face-plate is removed. The face-plate can be nailed to timber moulds or shutters, the integral lugs (two on four sides) provide ample fixing points to tie-wire thAlternativelye unit to the wall reinforcement (ideal for slip-forms). The recyclable face-plate incorporates a central ‘soft-eye’ into which a hammer-claw can be inserted to pull and detach, revealing the clear recess.

Product series

Artical Description Capacities
TSS 20 FA Connection stair-landing 20 kN
TSS 41 Stair connection 40 kN
TSS 101 Stair connection 100 kN
TSS 102 Stair connection 100 kN
RVK 101 Stair connection 100 kN

IC Academy

For more info and films, see IC Academy. Engineering and assembly.

Additional products RVK and TSS

 Artikkel nr. Produkt beskrivelse bilde
RVK/TSS 41 Rubber flange Laget av elastomer, hardhet 60 shore.
RVK/TSS 101 Rubber flange Made of elastomer, hardness = 60 shore
RVK/TSS 102 Rubber flange Made of elastomer, hardness = 60 shore
RVK/TSS 41 Form box for recess Made of elastomer, hardness = 60 shore
RVK/TSS 101 Form box for recess Made of elastomer, hardness = 60 shore
TSS/RVK Guiding piece/ lid 40 Made of polyethylene PE
TSS/RVK Guiding piece/ lid 100 Made of polyethylene PE
TSS/RVK Winter storage Made of EPDM POS 300/60300/60, this fabric is water repellent
REDiBOX 100 Permanent Recess Former Made of recyclable HDPE

Sound reduction

Type Reduction Estimated value
TSS 102 with sound reduction 20-25 dB 42 dB
TSS 101/41 with vertical flange 10-12 dB 58 dB
TSS/RVK 5-8 dB 60 dB

For mere info se IC Akademiet.

Slab thickness and edge distances

Item no. Memo no. Side Link
TSS 20 FA 65 4
TSS 41 55c 5
TSS 101 55d 5
TSS 102 57 7
RVK 55b 5


Reinforcement design

Type Fv (kN) a b c R1 (kN) R2 (kN) R3 (kN)
TSS 41 40 115 110 155 81,1 17,4 41,8
TSS 20FA 20 80 90 n/a 37,8 n/a 17,8
TSS 101 100 120 125 160 196 42,1 96
RVK 101 100 120 125 160 196 42,1 96
TSS 102 100 120 177 160 167,8 35,6 67,8

Recommended reinforcement pattern

Type Recommended reinforcement pattern, memo no. Calculation reinforcement pattern, memo no.
TSS 20 FA 65 65
TSS 41 55c 54c
TSS 101 55d 54d
TSS 102 57 60
RVK 101 55b 54b


Technical manuals

Click here to find the technical manuals


Follow this  link  for 2D and 3D drawings of the units

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