
PULTRUDED STRUCTURAL PROFILES
GRP Box Sections
Pultruded GRP box section for posts, frames, guards, supports and lightweight corrosion-resistant structures.
Box section applications
Posts and uprights
Handrail posts, equipment guards and vertical members coordinated with baseplates and rails.
Frames and enclosures
Rectangular and square frames for guards, screens, supports and access assemblies.
Fabricated modules
Cut and CNC-prepared parts for repeated frames, brackets and lightweight structural modules.
Specify the section, direction and support
Pultruded GRP is directionally reinforced. Geometry, fibre direction, span, restraint, connection and service environment must be considered together when the profile carries load.
- Use box section terminology on schedules
- Confirm square or rectangular outside dimensions
- Check wall thickness and internal access
- Detail sleeves, inserts or backing plates where required
- Avoid crushing thin walls at bolted connections
Information needed for selection and quotation
| Input | What to confirm | Why it matters |
|---|---|---|
| Section | Outside width and height, wall thickness and corner radius | Defines geometry, fit and available material data. |
| Length and quantity | Stock lengths, finished cuts, tolerance and piece count | Controls cutting yield, labelling and packing. |
| Structural duty | Span, supports, loads, deflection and restraint | Allows the designer to verify section suitability. |
| Preparation | Square cuts, mitres, holes, slots, notches or complex CNC shapes | Separates simple cutting from fabrication-ready preparation. |
| Environment | Moisture, chemicals, salt, UV, temperature, fire and electrical requirements | Influences resin, surface veil, colour and fixings. |
Cut, drill and CNC preparation
Supply can be arranged as full stock lengths, simple cut lengths or a drawing-led preparation package. CNC cutting is useful for repeated holes, slots, notches and complex shapes where controlled geometry and part identification reduce site work.
Send dimensioned drawings in a usable format and identify tolerances, datum faces, hole sizes, edge distances and whether cut edges require sealing or finishing.
Installation principles
- Support and restrain profiles as shown by the project design
- Use compatible corrosion-resistant fixings and backing details
- Avoid uncontrolled holes, notches and sharp internal corners
- Control GRP dust during cutting and drilling
- Check completed dimensions before installation
Final structural verification and connection design remain the responsibility of the project designer.
Frequently asked questions
Which GRP box sections sizes and lengths are available?
Eight confirmed Business Central options cover 38 × 38 × 3.2 mm through to 101 × 101 × 6.35 mm. Listed options include 5 m or 6 m lengths and Grey, Yellow or Phenolic variants where confirmed.
Can GRP box sections be supplied cut to length?
Yes. Provide finished lengths, quantities, tolerances and clear part references. Include dimensioned drawings where holes, notches, slots or other preparation are required.
How should I select the correct section and support arrangement?
Confirm the section geometry, orientation, span, loading, restraint, connections and service environment. Product-specific data and the actual support condition should be checked by the project designer.
How are long profile lengths delivered?
Delivery treatment depends on length, quantity, destination and unloading access. See Delivery & Collection or send the schedule for confirmation.
How do I request trade or project pricing?
Use the project and bulk quote route with the section sizes, quantities, cut lengths and delivery requirements. Trade customers can also review Trade Accounts.
Choose the right buying route
Buy a confirmed standard option, send a cut list, request project pricing or ask the team for technical help.

Continue your profile order
Compare the family, calculate stock lengths, plan connections or send a finished cutting schedule.
Available to buy: GRP Box Sections
Shop square and rectangular GRP box sections for frames, rails, guards and light structural fabrications.
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GRP Box Sections
Price range: £86.54 through £241.65 ex VAT Select options This product has multiple variants. The options may be chosen on the product pageAvailable configurations 3 purchasable options
PR-BX-51-51-06-GY
GRP Box Sections – 50.8 x 50.8 mm, 6 mm, 6 m, Grey
- Profile Size
- 50.8 x 50.8 mm
- Wall Thickness
- 6 mm
- Length
- 6 m
- Colour
- Grey
600 × 5.08 × 5.08 cm 12.6 kg£86.54 ex VAT Choose this option
PR-BX-51-51-06-YE
GRP Box Sections – 50.8 x 50.8 mm, 6 mm, 6 m, Yellow
- Profile Size
- 50.8 x 50.8 mm
- Wall Thickness
- 6 mm
- Length
- 6 m
- Colour
- Yellow
600 × 5.08 × 5.08 cm 12.60 kg£86.54 ex VAT Choose this option
PR-BX-76-76-06-GY
GRP Box Sections – 76 x 76 mm, 6.35 mm, 6 m, Grey
- Profile Size
- 76 x 76 mm
- Wall Thickness
- 6.35 mm
- Length
- 6 m
- Colour
- Grey
600 × 7.6 × 7.6 cm 21.10 kg£241.65 ex VAT Choose this option
