Base for welding 42,4x93x4mm, RAW

The Strofix base for welding 42.4×93×4mm, RAW is an AISI 304 or AISI 316 stainless-steel round base plate for the Ø42.4 mm railing post tube. The plate is Ø93 mm in diameter (D) and 4 mm thick (h), supplied with a raw (unfinished) surface. The post tube is attached by welding. Choose the steel grade — AISI 304 or AISI 316 — at order time.

The Ø93 mm round plate sits between the compact Ø80 mm and the larger Ø100 mm plates, giving a mid-size circular footprint for the Ø42.4 mm round post tube. The AISI 316 grade option provides marine-grade corrosion resistance for coastal, pool, or high-humidity installations, while AISI 304 suits standard interior and exterior use. The raw surface is standard for base plates concealed by a decorative cover after installation.

Use cases:

• Mid-size floor mounting of Ø42.4 mm round railing post tubes
• Round post bases needing a larger footprint than the Ø80 mm plate
• Marine-grade AISI 316 round post base for coastal installations
• Round tube railing systems with a Ø93 mm base footprint
• Welded post bases concealed by a decorative cover

FAQ

What post tube does this base plate fit?

The Ø42.4 mm round post tube — the standard railing pipe in the Strofix range.

Which steel grades are available?

AISI 304 or AISI 316. Choose AISI 316 for coastal, pool, or high-humidity installations.

What are the plate dimensions?

Ø93 mm diameter (D) with 4 mm thickness (h). It is a round plate, matching the circular profile of the Ø42.4 mm post tube.

How does this compare to the D80 and D100 plates?

The D93 is the mid-size round plate between the compact D80 and the larger D100. Choose the diameter for the required footprint and number of anchor points.

How is the post tube attached?

The post tube is welded to the base plate using TIG or MIG welding.

Why is the surface raw?

The raw finish is standard for base plates that are concealed by a decorative cover after installation.

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.