A railing quotation can look complete while leaving its connections to the building unresolved. A drawing package for steel handrail and railing should show both the supplied assembly and the surfaces it will meet. Give the fabricator enough information to price the work, and give the project designer a clear record of the interfaces that need approval.
Give each run a location and a direction
Mark railing runs on a plan, then reference their elevations and sections. Identify the start and end of each run, changes in level, corners, stair slopes, landings and nearby equipment. State the drawing units and the reference level used for heights. A dimension without a clear starting surface leaves room for a different interpretation.
Photographs help explain an existing platform, but put the required dimensions on the drawing. Show which measurements are confirmed and which await a site survey. If the floor finish or platform steelwork will change, record the proposed finished condition as well as the condition visible in the photograph.
Draw the connection at each type of support
Ask for a detail at every different support arrangement. The review should identify the post position, base plate orientation, available supporting surface and any nearby obstruction. Keep the proposed fastener or welded connection linked to that detail. A connection accepted in one position should have its own review before it is repeated on a different support.
- Identify who designs the railing and who approves its connection to the structure.
- Show the supporting steel or concrete information available to those reviewers.
- List holes, welding, anchors and site work within the supplier’s scope.
- Record any finish, access or installation restriction that affects the proposed connection.
Leave design values and anchor selection to the responsible project designer. The purchasing drawing should reference the approved requirements and their revision. It should also make any unresolved design item visible before the order is released.
Check what the installer will receive
Match the assembly drawing to a component schedule. Use consistent marks for posts, rails, corners, removable sections and connection items. Where two components look similar but fit in different positions, identify that difference in the schedule and on the drawing. Agree how the marks will remain readable through the specified finishing and packing process.
Finish the review with an issue list. For each open item, name the person who must respond, the drawing affected and the date needed for fabrication. When the answer arrives, revise the drawing and close the item by reference. Send the fabricator one released package, with its component schedule and approvals, so the shop and installation team work from the same arrangement.
