Finished FRP product
Fiberglass rectangular tube
A fiberglass rectangular tube is a hollow glass fiber reinforced polymer section with two different nominal outside side dimensions. Also described as a GRP or glass fibre box section, it needs a complete width, height and wall specification. A single published width cannot identify the part, its internal opening or its installed orientation.
Download spec sheet & RFQ checklist (.txt)Illustrative section · not to scale
Selection notes
Define both outside sides
Show the installed orientation
Choose the configuration
What to resolve before selecting this product
Define both outside sides
Label width and height directly on the drawing. If a supplier reverses their order in a quotation, reconcile the labels before acceptance rather than relying on a text size description.
Show the installed orientation
Identify which face is vertical and where loads and connections act. Turning the section changes its geometry relative to the assembly; do not approve rotation as a cosmetic change.
Control the internal envelope
An insert needs two clear dimensions and corner clearance. Indicate whether it enters from one or both ends and whether internal obstructions from fasteners are permitted.
Evidence and purchasing requirements
A complete rectangular section needs two sides
| Order detail | Why it needs its own drawing reference |
|---|---|
| Width and height | The source provides only one outside-side range; request the missing dimension instead of assuming a square section. |
| Long and short faces | Hole patterns and mounting clearances must refer to the intended face. |
| Internal opening | Specify both clear dimensions, corner geometry and insertion length. |
| Installed orientation | Show the mounting direction and identify the design review required for a rotated substitute. |
A rectangular outline does not establish superiority over a round or square tube. Compare complete sections under the actual loading and support arrangement using product-specific properties. The supplier catalogue supports the product form, but does not provide enough geometry to select a finished part or establish allowable load. Record any drawing changes in the order revision history.
Sources and scope
- Henan Zhongsheng rectangular tube product reference
The second outside dimension is absent; no complete section or performance rating is inferred.
Specification
Configuration table
Published catalogue values are reference figures; the agreed configuration and acceptance criteria belong in the quotation. Unconfirmed values are marked TBD · ask factory.
| Parameter | Specification / requirement |
|---|---|
| Order convention | Width × height × wall × cut length; mark installation orientation |
| Complete available cross-sectionThe manufacturer listing omits the second outside side. No complete SKU can be inferred. | TBD · ask factory |
| Bore, corner radii and tolerances | TBD · ask factory |
| Material formulation and mechanical evidence | TBD · ask factory |
| Minimum quantity and lead time | TBD · ask factory |
Reference: Henan Zhongsheng — rectangular tube catalogue. Manufacturer page reviewed 2026-10-22. Rectangular form is supported, but its incomplete dimensional listing cannot establish an orderable section. Updated .
Supply workflow
From product specification to delivery
Use these stages to define responsibilities, interfaces and the evidence needed at handover.
- 01
Complete the section schedule
List width, height, wall, cut lengths and quantities with units.
- 02
Resolve orientation and interfaces
Confirm long-face drilling, end datums and insert clearance with the factory.
- 03
Approve the proposed sample
Check the intended assembly orientation and record accepted dimensional deviations.
- 04
Verify the production lots
Match drawing revision, part labels and inspection results before dispatch.
Scope of supply
Define the supply package and its options
Request an itemized quotation against these lists. A catalogue description does not confirm that every item is included.
Product and work to specify
- Finished rectangular tubes matching the accepted drawing revision and quantities
- Agreed packing, part labels and batch inspection documents
Options and services to price separately
- Long-face or short-face machining, samples and assembly testing
- Custom tooling, additional documentation and freight as agreed
Applications
Applications to discuss with engineering
- Frame members subject to project design
- Bracketed assemblies requiring distinct long and short faces
Cross-sections
Product forms and catalogue examples
- Rectangular hollow section to a complete dimensioned drawing
Prepare your enquiry
Send an enquiry that can be quoted
Include the drawings and requirements below so engineering can confirm the configuration, exclusions and lead time.
Include in your RFQ
- Both outside dimensions, wall and corner details
- Installed orientation and long/short face labels
- Hole datums, inserts and end-access requirements
- Loads, exposure and required material documentation
- Cut-length quantities, packaging, destination and delivery request
Agree the acceptance evidence
- Measure width and height separately against the approved drawing.
- Verify wall and corner clearance at agreed locations.
- Check holes on the correct face and from the specified end datum.
- Inspect twist, straightness, cut ends and lot traceability.
Commercial terms
Who you contract with
- Manufacturer
- Henan Zhongsheng Composite Material Co., Ltd.
- Warranty party and term
- Henan Zhongsheng Composite Material Co., Ltd.; term and coverage confirmed in the written quotation.
- Contracting party and exporter of record
- pultrx, Shanghai, China
- Incoterms
- FOB Chinese port by default; CIF/DAP on request
- Payment
- Agree milestones for specification approval, any required samples, batch inspection and shipment. Exact split on the quotation.
- Third-party inspection
- SGS, BV or TÜV pre-shipment inspection accepted, cost borne by the buyer
- Performance and inspection
- Specify the intended use, design loads, environment and applicable test methods. Confirm material data, dimensional tolerances and required inspection reports for the quoted product; catalogue examples do not establish project approval.
- Order quantity and lead time
- Confirm minimum order quantity, cut lengths, packing and working days from specification approval. Availability is established in the quotation.
FAQ
Questions buyers ask
- Can the published width identify a rectangular tube?
- No. The second outside side and wall are needed, along with corner details where fit matters. Ask for a complete section drawing before placing an order.
- Can I rotate the section to suit a bracket?
- Submit the revised orientation for review. Confirm mounting clearances, load direction and connection details before changing the accepted assembly.
Send a cross-section drawing. Get a scoped quotation.
Every quotation names the manufacturer, the exporter of record and the warranty party, and lists what is included.