Procurement guide
Cable Penetration Inquiry Checklist
Prepare a clear firestop enquiry with opening details, cable information, project documents, quantity units and unresolved questions.
The short answer
A useful cable penetration enquiry identifies the opening, the services passing through it, the project requirement and the documents available for review. Add requested quantity units, destination and contact details. Mark missing information as unknown instead of guessing a product, performance rating or installation detail.
What should the enquiry achieve?
A cable penetration is where cables or associated services pass through a building element. Your enquiry should identify that location and explain the request. It supports a proposal, not approval to install a material.
If a project specification exists, reference its exact revision and relevant section. 3M’s specification resources distinguish through penetrations from construction joints; identify the application in your request rather than using a broad description such as “sealing work”.
Gather the opening information
Hilti’s published engineering enquiry guidance asks for construction details, penetrating services, opening information and supporting images. For a purchasing brief, organise the available facts as follows:
- Location: project reference, building or area, opening ID, and whether the opening passes through a wall or floor.
- Construction: the stated substrate and assembly description, including any existing drawing or design reference.
- Geometry: the recorded opening shape and dimensions, with units and an indication of whether measurements are provisional.
- Services: cable or service types, recorded sizes, bundle or tray arrangement, and any known sleeve or insulation details.
- Requirement: the performance and documentation requested by the project specification; identify the person who can clarify it.
- Evidence: photographs or a sketch tied to the opening ID, plus relevant drawings available for sharing.
- Open questions: anything unmeasured, unconfirmed or changed since the drawings were issued.
Add a separate purchasing summary
State the products of interest without presenting them as an approved solution. Give quantities in explicit units, such as pieces, cartons, bags or cartridges. If you only have an opening schedule, provide that instead of inventing a material quantity.
Add the delivery country and destination, desired delivery date and any packing preferences. These are buyer requirements for discussion, not promises about availability, lead time or delivery terms. Identify the person responsible for commercial replies separately from the person reviewing technical documents.
Make the supporting information easy to follow
Use matching identifiers across files and the message. Identify superseded versions and remove unrelated confidential information before sharing. For the first enquiry, describe which files you have; agree a transfer method if attachments are needed.
| Item | Useful identification |
|---|---|
| Opening schedule | Opening ID, location, drawing reference and revision |
| Photograph or sketch | Matching opening ID and the date recorded |
| Project requirement | Document title, revision and relevant section |
| Product shortlist | Exact catalogue name and the questions still outstanding |
Keep unknowns visible
Ask the supplier to separate confirmed information, assumptions and questions in the response. If a changed drawing affects the request, send an updated brief before accepting an offer. The official examples concern their publishers’ review processes and do not establish any approval, engineering service or certification for HECHUANG.
Buyer questions
What if I do not know the required fire rating?
Write “to be confirmed” and request clarification from the person responsible for the project specification. Do not infer a requirement from another project or a product name.
Are photographs enough for a quotation?
They help explain the request, but they may leave dimensions, construction and document requirements unresolved. Identify those gaps and ask what additional information is needed.
Should I list several different openings together?
You can include them in one enquiry, but give each opening a distinct ID and its own information. Avoid grouping different conditions under one undifferentiated quantity.
Sources & scope
The references below explain general firestop procurement and documentation concepts. They do not establish testing, certification or approval of HECHUANG products.
- Hilti Engineering Center — Information requested for a firestop review
- 3M — Firestop Product Specifications
Match the material and its supporting documentation to the project specification.