Architectural Galvanizing Coordination for Steel Components

Why coordinate galvanizing early

Hot-dip galvanizing adds a metallic layer to the steel, and that layer changes the size of the part slightly. Threads, sliding fits and bolted connections can end up tighter than the drawing intended. For architectural work, where visible edges and joints matter, this is not a minor detail.

When the architect, the fabricator and the galvanizer agree on the process at the design stage, the coating does not become a surprise at delivery. Decisions about access holes, venting and assembly sequence are much easier to make on paper than on site.

Measurement and site survey

Accurate measurement starts with the actual building, not only the architectural model. Walls can be out of plumb, openings can differ from the plan, and existing structure may have changed during construction. Our team measures on site and records the results in a written drawing for approval.

• Confirm all openings and fixing points on site
• Note existing finishes that the new steel must match or meet
• Record access routes for transporting large components

Drawings, specification and coating allowance

The drawing should show the galvanized dimensions, not only the nominal dimensions of the bare steel. We plan the coating allowance, the position of vent and drain holes, and where lifting points are needed so the piece can be dipped and handled safely.

A written specification records the steel grade, the coating standard, the finishing method and the tolerances agreed for each element. Both parties sign off before production, which keeps the project on one shared version of the design.

Production in the factory

Once the drawing is approved, the components are cut, welded and prepared in our factory at Rival Street 37 in Tel Aviv. Welds are ground where they will be visible, and the surface is cleaned so the zinc bonds evenly. Parts are assembled in test fit where possible to catch problems before they reach the galvanizer.

After galvanizing, we check dimensions, straightness and the finish. Where a powder coating is planned on top of the zinc, the surface is prepared to suit that finish.

Handling, delivery and installation

Galvanized parts are heavy and the surface can be marked by careful handling. We protect edges during transport and mark each piece so it matches its position on the drawing. Clear labelling saves time on site when the team is fitting many similar elements.

Installation follows the sequence agreed during planning. Fixings and connections are checked against the drawing, and any on-site adjustments are recorded so the architect has an accurate final record.

Standards and checks with the engineer

Architectural elements such as railings are subject to general Israeli requirements, including the railing standard SI 1142. The exact numeric values for loads, heights and spacing depend on the project and are confirmed with the structural engineer rather than assumed from memory.

We recommend that the engineer reviews the final drawing before fabrication. This review is a normal step in our process and avoids changes after the zinc is applied, when corrections are costly.

Frequently asked questions

Does galvanizing change the size of steel parts?

Yes, the zinc layer adds thickness to the surface, so threads and tight fits can be affected. The drawing should account for this before fabrication starts.

When should the architect bring in the fabricator?

Ideally at the concept or early design stage, so that coating, joints and access holes are planned together. Late involvement often leads to redesign.

Who decides the coating method?

The coating method is agreed between the architect, the fabricator and the galvanizer, based on the use of the element and its finish requirements. Our team advises on the options.

Do you measure on site before production?

Yes, we measure on site and prepare a written drawing for approval before any production begins, so the components match the actual building.

Common mistakes to avoid

Designing with bare-steel dimensions and forgetting the zinc layer is the most common error. Leaving out vent holes and lifting points until after fabrication also causes delays and rework.

Our recommendation

Send us your architectural drawings and site photos early, and ask for a joint review with your structural engineer before production. Agreeing the galvanized dimensions and handling points at this stage saves the most time and cost.

Summary

Coordinating galvanizing early, with accurate site measurement and approved drawings, gives architectural steel that fits, looks right and performs well.

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