RC support — horizontal layout of GS MW S/CH panels

Function of the junction

RC support = a load-bearing column made of concrete instead of the typical steel one. It is used in:

• Industrial halls requiring the fire resistance of reinforced concrete (REI 60–180).
• Halls with high horizontal loads — e.g. underslung cranes, pressure from stored materials.
• Hybrid halls — steel framing + reinforced concrete load-bearing columns (mixed construction).

Vs. a steel support: different fasteners — special concrete anchors (item 06) instead of the typical self-drilling fasteners for steel.

Critical installation aspects

• Concrete anchors (item 06) — chemical (Hilti HVU, Fischer FIS) or mechanical (Hilti HSL, Fischer FAZ); minimum concrete class C20/25 is required.
• Drilling holes in the reinforced concrete — check that the drill does not hit the rebar (rebar scanner or the structural engineer’s reinforcement plan).
• Mineral wool (item 05) in the 20 mm gap between panel and column — critical, as concrete has λ ≈ 1.7 W/m·K and forms a strong thermal bridge.
• OB-17 cover flashing fixed with concrete screws + rivets to the panel; do NOT connect rigidly — concrete and panel respond differently to thermal movement.
• Anchor pull-out test — in halls with high requirements (e.g. cranes), pull-out testing of 3 sample anchors with a force ramp is required.

Documentation

GS MW S/CH/U Technical Catalogue (Gór-Stal 2025), page 34 — RC support, horizontal layout. Scale 1:5.

Components in this junction