Custom steel and stainless sports structures: how a manufacturing quotation is built

A custom manufacturing quotation for a sports structure, whether a cage, a rig, an outdoor station or an equipment chassis, breaks down into eight cost lines: design and drawings, raw material, cutting and forming, welding, anti-corrosion finish, hardware and machined parts, quality documentation, then transport and installation. The final price depends far less on the kilo of steel than on welding hours, the finish specification (epoxy, hot-dip galvanising, stainless) and the documentation your contract demands. Insist on a line-by-line breakdown: a single global figure makes it impossible to compare, negotiate or trade off.

When custom manufacture is the right answer

Most projects are solved from a catalogue: a standard cross training cage, an EN 16630-compliant street workout station, an off-the-shelf rack. Custom manufacture becomes relevant in four specific situations:

• A site constraint no standard product fits: unusual ceiling height, a structural column in the middle of the zone, a party wall that cannot be drilled.
• A public or defence specification imposing dimensions, loads or materials outside any standard range.
• Brand identity: a structure in the club’s geometry and colours.
• A production run, from an equipment bracket to a complete chassis, where amortising tooling changes the economics.

The usual reflex is to ask a general fabricator for a price. The problem is that a general metalworker knows how to weld but knows neither the dynamic loads of repeated muscle-ups, nor the requirements of sports equipment standards, nor the traps in a sports equipment technical specification. The classic outcome is a structure that is strong on paper, non-compliant in use, and impossible to defend at safety inspection. Our tender specification guide covers those traps in detail.

The eight lines of a custom manufacturing quotation

1. Design and drawings. If you supply dimensioned drawings, this line reduces to checking them. Without drawings, design is quoted separately: site survey, modelling, sizing calculations. This is the line that de-risks all the others.
2. Raw material. Structural steel to EN 10025 (grade S355 offers roughly 29 per cent more yield strength than S275 at equal section), stainless for marine or chlorinated environments, brass or bronze for certain technical parts. The grade and section choice drives weight directly, and therefore material, transport and anchoring costs.
3. Cutting and forming. Laser cutting of sheet and tube, CNC folding, bending. The precision of this stage determines assembly quality and the welding time that follows.
4. Welding and assembly. The core cost of a fabricated structure, because it is qualified labour time. Simplified geometry, standardised sections and repetitive joints reduce this line more reliably than any negotiation.
5. Anti-corrosion finish. Epoxy paint in your chosen colours for indoor use; hot-dip galvanising to EN ISO 1461 for outdoor use, where the zinc protects the steel even when scratched by sacrificing itself; raw or brushed stainless for coastal sites.
6. Hardware, machining and accessories. Pins, spindles and spacers machined to close tolerances, stainless fasteners, end caps and handles (plastic injection is viable in both small and large runs), anchor plates.
7. Quality documentation. Inspection and test plan (ITP), first article inspection report (FAI), material certificates, declaration of conformity. Essential for public contracts and defence sites; unnecessarily expensive if your private project does not require it, which is precisely why it should be priced separately.
8. Transport and installation. Heavy, bulky structures need specialist hauliers, anchoring, levelling and handover. Priced against the actual site, never as a blind lump sum.

What a good quotation shows you. Demand the breakdown by line. A single global figure prevents comparison and prevents trade-offs, such as keeping the geometry but moving from stainless to powder-coated galvanised steel outside a marine zone. A line-by-line quotation is also what allows a usable schedule of rates to be produced for a public procurement.

The standards that govern a custom sports structure

This is where a specialist sports equipment manufacturer differs from a general fabricator. Compliance in use under EN 16630 or EN ISO 20957 cannot be added afterwards with a coat of paint. It is designed in at the sizing stage, through spacings, free heights of fall and clearance zones.

Five levers that reduce a quotation without weakening the structure

1. Provide a closed brief

Area, height, service loads, user population, environment (indoor, outdoor, marine), anchoring constraints. Every unknown is paid for in safety margin, which means steel and hours.

2. Standardise the sections

A structure drawn with three tube sections instead of seven reduces material offcuts, machine setups and welding time. This single decision routinely moves a quotation more than any commercial discussion.

3. Match the finish to the actual exposure

Stainless steel is unbeatable against salt spray but heavily over-specified for a covered gymnasium. Epoxy indoors, powder-coated hot-dip galvanised for standard outdoor sites, stainless in marine or chlorinated environments. The right material in the right place, not the noblest material everywhere. Our guide to steel grades and finishes sets out the whole-life comparison.

4. Think in production runs wherever possible

Moving from a one-off to a series amortises setups, jigs and, where relevant, injection tooling. A group of municipalities equipping several sites with the same structure pays materially less per unit than a single isolated piece.

5. Pay for documentation only where the contract requires it

ITP, FAI and material certificates are valuable in a public tender and on a defence site. For a private studio, a declaration of conformity and standard certificates are usually sufficient. Ask for this line to be priced separately so that the decision is yours.

How a custom project actually runs

A typical project moves through five stages: brief and survey of constraints; proposal with a layout drawing; approval of the manufacturing drawings; workshop production with documented inspections; then delivery and installation. For custom cages and large rigs, allow 4 to 6 weeks of production, delivery and installation included. The same process underpins our turnkey projects, where the structure is one element of a wider fit-out.

Two points determine whether that timeline holds. First, drawing approval: every day the client takes to approve manufacturing drawings is a day added to the programme, because production cannot be scheduled against unapproved geometry. Second, the site survey: anchoring conditions, access for delivery vehicles and the availability of the working area are the three things that most often push installation, and all three are established in a half-day survey at the start.

Why the manufacturer matters as much as the price

Three questions separate suppliers far more effectively than a price comparison:

• Who signs off the load calculations, and against which standard?
• What fixing loads and foundation drawings will be issued, and at what stage of the programme?
• What is the spare parts and repair route five years after installation, for a structure that is welded rather than bolted?

A structure is a twenty-year asset. The supplier who cannot answer those three questions is quoting a price for steel, not for an installed sports facility. Our custom sports equipment manufacturing capability covers fabrication, laser cutting, machining and finishing in our own workshops.

Frequently asked questions

How much does a custom sports structure cost?

There is no reliable price per square metre. The cost depends on geometry, steel grade, welding time, finish (epoxy, hot-dip galvanising, stainless) and the documentation required. The only serious approach is a quotation broken down line by line, prepared from your drawings or from a closed brief.

Do I need drawings to get a manufacturing quotation?

No. With dimensioned drawings, pricing is faster and the design line reduces to a verification. Without drawings, design is quoted separately: survey of site constraints, modelling and sizing calculations, followed by client approval of the manufacturing drawings before production starts.

Galvanised steel or stainless steel for an outdoor structure?

Hot-dip galvanised steel to EN ISO 1461, powder-coated, suits the majority of outdoor installations, because the zinc protects the steel even where the coating is scratched. Stainless steel becomes the right specification on the coast, in salt spray zones or in chlorinated atmospheres, where its corrosion resistance justifies the premium across the life of the structure.

Can a custom structure comply with EN 16630 or EN ISO 20957?

Yes, provided compliance is built in from the design stage. Spacings, free heights of fall, clearance zones and service loads are all sized at drawing stage, not after fabrication. That is the practical difference between a specialist sports equipment manufacturer and a general fabricator.

What are the lead times for a custom structure?

For custom cages and large rigs, allow 4 to 6 weeks of production including delivery and installation, from approval of the manufacturing drawings. Add the design and approval phase upstream, which typically runs two to four weeks depending on how quickly drawings are signed off.

Should the quotation include installation?

It should be priced as a separate line, against the actual site, never as a blind lump sum. Installation cost is driven by access, anchoring substrate, lifting requirements and whether the area can be handed over free of other trades. Those variables are established in the site survey, and a supplier who prices installation without one is guessing.