Plinth at sill beam — horizontal GS MW U panel layout, variant III

Junction function

Variant III of the horizontal GS MW U plinth = OB-15 drip edge + OB-15a stiffening flashing (d=60-100 mm). The stiffest configuration among the 3 horizontal U plinth variants — OB-15a reinforces the drip edge independently of panel thickness, allowing large overhangs without the risk of deformation under wind pressure and thermal loads.

Critical installation aspects

• OB-15 + OB-15a = premium-grade drip edge with additional stiffening; L-profiled + flat sealing sheet on the external side.
• OB-41 starter angle anchored to the sill beam with steel quick-install expansion anchors — spacing ~600 mm.
• OB-06 internal corner flashing for the interior-side finish.
• PM1 concealed fixing continued up to the bottom panel row — premium aesthetics without visible fasteners.
• Drainage strip in the ground below the drip edge (gravel + geotextile); prevents water accumulation at the sill beam.
• Strength check after the first season — inspection of OB-15a stiffness + retightening of rivets joining the drip edge sheets.

Documentation

GS MW S/CH/U Technical Catalogue (Gór-Stal 2025), page 58 — Plinth, horizontal GS MW U layout, variant III. Scale 1:5.

Components in this junction