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TSS Stair Landing Connectors Specification
The Invisible Connections range of telescopic connectors was developed to solve the problem of unsightly support systems for precast slabs and beams, such as traditional bracketry and/ or corbel support details.
They consist of a cast-in, structural steel hollow section with inner structural steel hollow section deployed during installation. The TSS unit is identical to the RVK unit except for the TSS unit has no opening to the upper surface. The position of the inner tube is instead adjusted by two strings with different colour. The units have a control line marking the correct position of the sliding tube, and a hole for a locking bolt. The range of TSS connectors are primarily intended for precast stairs and landings, with two standard capacities; 40 kN and 100 kN. They are also useful for conditions other than stairs.
Advantages
- No bolts required.
- Recess in wall provides ample tolerance.
- No traditional angle supports means no crane.
- Recesses are formed between wall reinforcement.
- Tolerance gap required only 20 mm between landing and wall.
- No tools required.
- No obstructions means a clear route for following trades.
- All operations are safely conducted from above landing.
- Connectors automatically fireproofed after grouting.
- Connectors are concealed from view.
- Handles any shape concrete element.

Product reference
- [TSS 41] – 40 kN capacity.
- [TSS 81-30] – 30 kN axial capacity.
- [TSS 101] – 100 kN capacity.
- [TSS 102] – Sound reducing rubber composite.
Options
- TSS 81-30: Pinned connector enables robustness requirements to be achieved where only two walls are available for connection.
- TSS 102: Sound deadening rubber composite minimizes step-sound vibration from stairwell into adjacent rooms.
Steel finish
- Plain.
Dimensions
(w x h x t):
TSS 41 (standard version):
- Outer tube: 80 x 50 x 4 mm.
- Inner tube: 70 x 40 x 4 mm.
TSS 81-30 (pinned version):
- Outer tube: 120 x 60 x 4 mm.
- Inner tube: 100 x 50 x 6 mm.
TSS 101 (standard version):
- Outer tube: 120 x 60 x 4 mm.
- Inner tube: 100 x 50 x 6 mm.
TSS 102 (acoustic version):
- Outer tube: 120 x 80 x 5 mm.
- Inner tube: 100 x 50 x 6 mm.
Material
- Steel (grade S355, minimum).
Concrete strength class
- C35/45, minimum.
Reaction to fire
- Class A1, according to EN 13501-1.
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