How to Outsource Rebar Shop Drawings: What to Send and What to Expect
Outsourcing rebar shop drawings is one of the highest-leverage decisions a structural engineering firm or general contractor can make. Done right, it frees your in-house team from production work, shortens drawing turnaround, and puts a specialist on the work who does nothing else all day. Done poorly — with the wrong partner or a disorganized handoff — it creates a revision loop that costs more time than it saves.
This guide walks through the practical steps of outsourcing rebar shop drawings: what to send, what you should get back, and how to evaluate whether your outsourcing partner is doing the job right.
What Are Rebar Shop Drawings?
Rebar shop drawings, also called reinforcing steel shop drawings or rebar placement drawings, translate the structural engineer's reinforcement design into fabrication and placement documents. They show every bar in the structure — size, grade, shape, length, bend dimensions, placement location, and lap splice details — in enough detail that a rebar fabricator can cut and bend the bars and a placing crew can install them without ambiguity.
A complete rebar shop drawing set typically includes placement drawings (showing where bars go in the structure), a bar bending schedule (listing every bar by mark with its dimensions and bends), and sometimes supplementary details for complex conditions like mat foundations, transfer slabs, and post-tensioned elements.
When Does Outsourcing Rebar Shop Drawings Make Sense?
Outsourcing makes the most sense when:
Your in-house team is at capacity and you need to maintain schedule on multiple concurrent projects
You have a project with heavy reinforcing complexity (transfer slabs, mat foundations, bridge elements) that requires dedicated production focus
Your local labor market has limited rebar detailers available for hire
You want to scale production up or down with project volume rather than carrying fixed headcount
You need a cost-competitive alternative to in-house production without sacrificing quality or turnaround
What to Send Your Rebar Detailer
The quality of what you send directly determines the quality and speed of what you get back. A complete handoff package includes:
Structural Drawings
Latest issued-for-construction (IFC) structural drawings in PDF or DWG format
Foundation plan, framing plans at each level, column schedule, and beam schedule
All sections and details referenced on the plans
Revision clouds and revision history if the drawings have been updated
Project Specifications
Applicable concrete and reinforcing steel specifications (ACI 318, CRSI, local code)
Rebar grade and coating requirements (ASTM A615, A706, epoxy-coated, stainless)
Cover requirements by structural element
Lap splice and development length requirements if calculated by the EOR and not to be taken from ACI tables
Project Schedule
Tell your detailer when fabrication needs to start and when the reinforcing needs to be on site. A detailer who knows the constraint works the schedule accordingly. One who does not know it defaults to their standard queue.
What You Should Receive Back
A complete outsourced rebar shop drawing package should include:
Placement Drawings
Plan views and sections showing the exact location of every reinforcing bar in the structure. Bars are called out by mark number, size, spacing, and quantity. Laps are shown with dimensions. Embedment conditions at walls, columns, and beams are detailed.
Bar Bending Schedules
A tabular list of every bar mark in the project with: bar size, quantity, total length, bend type (straight, 90-degree hook, 180-degree hook, stirrup), and all dimensions. This is the fabricator's cutting and bending list. It should match the placement drawings bar-for-bar.
Supplementary Details
Details for non-standard conditions: corner reinforcing, opening reinforcing, corbel reinforcing, pile cap reinforcing, and any conditions the structural drawings note require special detailing. These are the drawings that come back most often in engineer review if they are missing or unclear.
How to Evaluate Quality
When you receive the drawings from your outsourcing partner, a quality review should check:
Bar marks are unique and used consistently between placement drawings and bending schedule
Bar sizes and grades match the structural drawings at every location
Lap splice lengths are per the specification or ACI table, not shortened
Cover dimensions are called out correctly for each element type
The bending schedule quantities add up against the placement drawing callouts
Complex conditions (mat slab, transfer beam, shear wall boundary element) are fully detailed, not left vague
Drawings are titled, dated, and carry a revision block
Realistic Turnaround Times
Rebar shop drawing turnaround depends on project complexity and drawing volume:
Small residential or light commercial project (under 50 sheets): 5 to 10 business days
Mid-size commercial or industrial project (50 to 150 sheets): 10 to 20 business days
Large or complex project (150+ sheets, mat foundations, transfer elements): 20 to 40 business days
These timeframes assume a complete, well-organized handoff package. Incomplete drawings that require multiple RFIs can add weeks to any of these ranges. The fastest way to reduce turnaround is to deliver a complete package at the start.
AutoCAD and Tekla for Rebar Detailing
Most rebar shop drawings are produced in AutoCAD, where 2D plan and section views are the standard deliverable. For large, complex projects where 3D modeling reduces coordination conflicts and RFIs, Tekla Structures can produce rebar models from which all drawing views and the bar bending schedule are derived directly — eliminating transcription errors between the model and the schedule.
Shop Drawings Pro works in both AutoCAD and Tekla for rebar shop drawings. Specify your preferred format when you send the scope.
Start with a Free Evaluation
Shop Drawings Pro provides rebar shop drawings for structural engineering firms, general contractors, and rebar fabricators across the US and Europe. New clients receive a free project evaluation — send us your scope and we will provide a straightforward assessment of what the package will include, how long it will take, and what it will cost.
Contact Shop Drawings Pro to request your free evaluation and get your rebar package started.