GRP for Main Contractors
A GRP package covers all the GRP on a project, from riser flooring to roof walkways and handrails. At UIS, we detail, fabricate and install the whole package as one subcontractor, using our own site teams.

















What does a GRP package from UIS include?
Our GRP package covers all the GRP on a job: riser flooring, roof walkways and step-overs, plant platforms, stairs, handrails and fencing, plus the support steelwork. We detail, fabricate and install the whole GRP package as one subcontractor.
If you are letting the GRP on a commercial or industrial job, the package has to be detailed to your engineer's loads, arrive cut to size for your programme, and be installed by people named on the RAMS.
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One subcontractor for all the GRP
We detail, fabricate and install the GRP and its support steelwork, so when a service penetration moves, you have one subcontractor to call.
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Cut to size for your programme
We cut the GRP and fabricate the steel in our Rotherham workshop, so the time on site is spent installing.
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Paperwork ready
You get the RAMS before we start, the O&M pack at handover, and the accreditations your PQQ asks for.
What the GRP package covers
What we take on, what we need from you to quote, and what you get at handover.
- Riser flooring
- GRP panels and support frame at each floor, for fall protection (not fire stopping)
- Set by: Loads from your engineer, fire class from your fire strategy
- Roof walkways and step-overs
- GRP walkways to the plant, with guardrails
- Set by: The roof build-up and the plant layout
- Platforms and stairs
- GRP or steel, to suit the loads
- Set by: The equipment and the loads
- Handrails and fencing
- GRP handrails, guardrails and palisade
- Set by: The load class and the perimeter design
What we need from you to quote
- the general arrangement drawings and the M&E coordination drawings
- the loads from your structural engineer
- the fire class for any riser flooring, from your fire strategy
- the programme and the access windows
- your site rules and induction requirements
What you get at handover
- the O&M pack, with the manufacturer's test data for the products installed
- as-installed drawings
- the RAMS we worked to
- a 12-month defect liability period from practical completion, in line with standard JCT terms, unless your contract sets different terms
We price GRP packages from your drawings. These are the main things that affect the price:
- the scope across risers, roofs, platforms and handrails
- the support steelwork included
- the programme and the number of site visits
- site access and lifting
- working hours
Our GRP product pages
Each of these has its own page with the full specification.
- GRP riser flooringA walk-on floor over service risers at each level
- GRP walkwaysA safe route across a roof, plant room or process area
- GRP access platformsRaised access to plant, or crossing pipework and upstands
- GRP stairsA new stair to a platform, mezzanine or roof
- GRP handrailsEdge protection along walkways, platforms and stairs
- GRP palisade fencingA non-conductive, corrosion-free perimeter
From survey to handover.
We survey, detail, fabricate and install the GRP ourselves, so one company is responsible for the whole job.
Survey and measure
We take off the package from your drawings, and walk the site with your team where it helps. On an existing structure we can 3D-scan it, so our drawings match what is on site.
Drawings and quotation
Our draughtsmen detail the GRP and any support steelwork to the loads your structural engineer gives us. We then send an itemised quotation that includes fabrication and installation. On major commercial packages the quotation comes back within 1 to 2 weeks.
Fabrication
We fabricate the support steelwork and cut the GRP panels and sections to size in our Rotherham workshop, so most of the cutting is done before delivery.
Installation
Our own site team installs the GRP under an SSSTS-qualified supervisor, to a method statement written for the job. We cut the GRP to size in our workshop, so there is little cutting on site. Where a panel does need trimming, we cut it with a diamond blade under dust extraction, away from live areas where possible, and no hot-works permit is needed.
Handover
At handover we give you the O&M pack, with the manufacturer's test data for the products we installed. The 12-month defect liability period runs from practical completion, in line with standard JCT terms, unless your contract sets different terms.
Why give the GRP to one subcontractor
When one subcontractor details, makes and installs all the GRP, you deal with one company when a penetration moves or a delivery is short. GRP weighs roughly a fifth of the steel equivalent, so our team can carry it to floors a crane cannot reach.
Request a quoteGRP stairs and landings.
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01
All the GRP on the job
We take on the riser flooring, roof walkways and step-overs, plant platforms, stairs, handrails, guardrails and fencing, plus the support steelwork we fabricate ourselves.
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Detailed to your engineer
Our draughtsmen detail the GRP and its supports to the loads your structural engineer gives us, and we send the drawings for your approval before we fabricate.
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Accreditations for your PQQ
We hold ISO 9001, CHAS Elite, Alcumus SafeContractor and ConstructionLine Gold. Any steel we fabricate is made to BS EN 1090 Execution Class 2 with UKCA marking. We carry GBP 10m public liability and GBP 10m employers' liability, and we can send the certificates the day you ask.
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Installed by our own site teams
Our own site teams install every job. Each job has an SSSTS-qualified supervisor, every operative holds a CSCS card, and the teams are PASMA and IPAF trained. We write a method statement for each job and plan the work around your site, out of hours where your programme needs it.
"I've worked with UIS for several years on some high profile and very complex projects. Their attitude and work ethic are second to none - providing high quality services and products which are delivered safely and on time every time. Overall they are a pleasure to do business with and wouldn't hesitate recommending UIS for any steelwork or metalwork packages."
Questions we get asked.
All the GRP on the job: riser flooring, roof walkways and step-overs, platforms, stairs, handrails, guardrails and fencing, plus the support steelwork we fabricate ourselves. We detail, make and install the whole package with our own site team.
On major commercial packages, our quotation comes back within 1 to 2 weeks. We do a full take-off from your general arrangement drawings, and the support frames and installation are priced in.
Your structural engineer sets the loads. Our draughtsmen detail the GRP and its supports to them, and we send the drawings for your approval before we fabricate.
ISO 9001, CHAS Elite, Alcumus SafeContractor and ConstructionLine Gold. Any steel we fabricate is made to BS EN 1090 Execution Class 2 with UKCA marking. We carry GBP 10m public liability and GBP 10m employers' liability.
Yes. Our own site team installs every job: CSCS-carded, PASMA and IPAF trained, under an SSSTS-qualified supervisor, working to a method statement.