Providing Drawings and Specifications for Glass Fabrication Orders

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Glass fabrication drawings are scaled plans and elevations that show the exact geometry, dimensions, glass type, fittings and finishes of a vitrine or glass partition. A clear written specification should accompany them so the manufacturer can confirm details before any glass is cut.

Why drawings matter for glass work

Glass cannot be easily adjusted once it is cut and tempered, so accuracy at the drawing stage saves time and cost for everyone. A good drawing removes guesswork about where the glass sits, how panels meet, and how the structure is anchored to floor, ceiling or wall.

For vitrines and partitions, the drawing is the reference for the factory, the installer and the client. Clear documentation reduces revisions and avoids disputes about what was agreed.

What to include in the drawing set

A complete set usually contains plan views, elevations of each face, and sections through key details. Each drawing should show overall dimensions, panel divisions and openings.

Plan and elevation views at a stated scale
Panel layout with widths and heights of every glass piece
Sections through edges, joints and fixings
Door and opening positions with swing direction
Reference points to finished floor and ceiling levels

Writing a clear glass specification

The specification explains what the drawing cannot. List the glass type, thickness, edge finish, colour, coating and whether the glass is clear, frosted or laminated.

Also state the frame or fixing system, hardware such as hinges, locks and handles, and the finish of the metal parts. Mention any requirements for safety glass in areas where it applies, and confirm the intended use of each element.

Taking site measurements correctly

Dimensions taken from the drawing alone can differ from the built environment. Where possible, have the manufacturer or a qualified person measure on site before the final glass is ordered.

Record openings at several heights and check for out-of-square walls, floors that are not level, and obstructions such as skirting, pipes or light fittings. Mark the measured values clearly on the drawing so the factory can see which figures were verified.

Approval and revision control

Before production starts, the drawing set should be approved in writing by the architect or designer. Mark each drawing with a revision number and date so everyone works from the latest version.

Any change after approval should be issued as a new revision and confirmed by all parties. This prevents the factory from cutting glass to an outdated layout.

Preparing files for the manufacturer

Send drawings in a format the factory can open and print to scale, such as PDF for review and the native CAD file for editing. Name each file with the project, element and revision so nothing gets mixed up.

Include photos of the existing site where relevant, and add short notes on anything unusual. Clear files help the manufacturer respond faster and reduce questions back and forth.

Frequently asked questions

Do I need a CAD file or is a PDF enough?

A PDF is fine for review and approval, but a CAD file is helpful if the manufacturer needs to adjust layouts. Sending both gives the factory the most flexibility.

Should I include glass thickness on the drawing?

Yes, glass thickness and type should be shown on the drawing or in the specification. Stating it clearly prevents errors in cutting and fitting.

What if the site measurements differ from my drawing?

Update the drawing with the verified measurements and issue a new revision. Confirm the change with the manufacturer before production continues.

Who should approve the final drawings?

The architect or designer responsible for the project should approve the drawings in writing. The client may also sign off where required by the project.

Common mistakes to avoid

Sending drawings without dimensions, scale or a written specification is a common error that leads to delays. Working from an old revision after changes were agreed causes costly rework.

Our recommendation

Measure on site before finalising the drawings, and give the manufacturer a single approved revision with a matching specification. This one step prevents most problems in glass work.

Summary

Clear, verified drawings and a complete written specification are the foundation of an accurate glass vitrine or partition order.

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