Specification Checklist / measurement basis
Standard sliding door size: define the opening first
A size label is a starting question. State whether the dimension describes a clear opening, a frame or a moving panel, then ask the supplier to identify the corresponding dimensions on the offered drawing.
Send Your DimensionsFields to resolve before a quote
Use separate fields for clear opening width × height, frame dimensions and leaf dimensions. Enter mm or inch alongside the number. For example, a buyer-written opening of 1200 mm × 2100 mm is only an illustration of notation, not a standard size, stocked item or approved design. Ask the supplier to confirm the associated panel arrangement and installation allowances on its own drawing.
Identify leaf construction, material grade when known, thickness in mm or inch and finish description. If the supplier uses gauge, ask for physical thickness alongside it. A finish sample should carry a reference that can be linked to the proposed item. List track, sill, hangers, handles, operator and controls as included, excluded or retained equipment rather than relying on the term complete.
Count full assemblies separately from loose panels and spares. Record opening identifiers, quantity units, delivery location, requested timing and packaging references. Compare each alternative against the same list. Unresolved dimensions or exceptions should remain marked open until a named reviewer accepts the supplier's response.
Selection questions by decision type
Specification and evidence
Does a public size chart prove project fit?
No. The public architectural sliding-door size reference is used to identify measurement fields, not to approve an elevator assembly or automatic entrance. Ask for the exact offered model drawing, intended application and relevant document scope.
How should a proposed alternative be checked?
Mark the original requirement beside the proposed value. Ask whether the change affects clear opening, panel travel, interface points, finish, included equipment or site work. A sample verifies only the characteristics it actually represents; request separate records for other performance claims.
Budget and supplier preference
What is the trade-off between budget and finish?
An economical construction may change visible finish, customization or support scope. A higher-cost supplier should still identify the specific added items. Compare actual inclusions and the total procurement basis; a preference for high-end, mid-range or budget suppliers is not evidence of a verified rating.
Can unknown fields remain open?
Yes. State the known application and mark unknowns for confirmation. Do not convert a reference picture into a thickness, dimension or approval. Continue with the procurement brief and keep the response tied to the same revision.
Send a specification that a supplier can answer
Use your measured opening, intended door use and quantity as the basis. List the unresolved dimensions and documents you need so each proposal can be reviewed on its actual scope.
- Opening and panel size with measurement units.
- Material, finish and included hardware.
- Quantity, destination and review responsibilities.