Base hammered 42,4mm, Satin

The Strofix bottom fastening, hammered, is an AISI 304 stainless-steel round base plate for the Ø42.4 mm round railing post tube. The Ø100 mm flange carries a formed collar sized for the post tube. Supplied with a satin finish.

The collar is formed directly from the flange rather than welded on, so the post sits square to the base without a separate joint at the plate face. The flange is bolted to the floor, slab or substrate through the fixing holes around its edge.

The satin finish means this base can be left exposed rather than concealed under a cover plate, which suits visible installations on terraces, balconies and interior stairs. AISI 304 stainless steel is suitable for standard interior and exterior installations.

Use cases:

• Floor-mounting Ø42.4 mm round railing post tubes to concrete slabs
• Visible base fixing for terrace and balcony railings where a satin finish is required
• Round post foundation for interior staircase railings
• Bolted post base for deck and rooftop railing systems
• Railing post base where a welded plate joint is not wanted at the floor line

FAQ:

What post tube does this base fit?

The formed collar is sized for Ø42.4 mm round post tube.

What is the plate diameter?

Ø100 mm.

How is the post fixed to the base?

The post tube seats into the formed collar at the centre of the flange. The flange is then bolted down through the fixing holes around its edge.

How does this differ from the base for welding?

This base has a collar formed from the flange itself and is supplied with a satin finish for exposed installations. The base for welding is a cast plate with an open aperture — the post tube passes through it and is welded, and it is supplied raw because it is normally concealed by a cover.

Is a square tube version available?

Yes. The same base is available for 40 × 40 mm square post tube, with a 100 × 100 mm plate.

About Base & Clamp Fastenings

A base or clamp fastening is a stainless-steel plate or bracket that anchors a railing post to the building structure, forming the structural foundation of the balustrade. Bottom fastenings bolt to the top of a floor slab, deck or beam, while side fastenings bolt to the vertical face of a fascia, edge beam or wall. Assembly clamps grip an existing tube or post without welding, and assembly plates provide a flat mounting surface for auxiliary connections.

Strofix supplies 18 base and clamp products for Ø42.4 mm round pipe and 40×40 mm flat-sided square posts, with plate diameters from Ø80 to Ø100 mm (round) and plate dimensions from 80×80 to 135×56 mm (rectangular/square), in satin or raw-surface stainless steel with AISI 304 and AISI 316 options.

Screw-hole configurations include 2, 3 and 4-hole variants. The correct fastening depends on mounting orientation, post profile, plate size, number of screw holes and the required surface finish.