Quality & Mistakes · Factory Shed Design

7 Common Factory Shed Design Mistakes (and How to Avoid Them)

Buyers of factory shed design tend to ask the same questions: what is actually included, what does it cost, which standards apply and how do you pick a reliable partner? This article answers all four with the level of detail your project team needs.

Key takeaways3 min read3 sections

The short version

  1. 1The 7 mistakes that cause most factory shed design reworkAfter reviewing hundreds of incoming factory shed design packages, the same seven failures account for the overwhelming majority of rework.
  2. 2A QA checklist you can reuseWhether you use us or another supplier, hold your factory shed design package to this acceptance checklist before you pay the final invoice:
  3. 3What good looks likeA well-run factory shed design engagement is quiet: few RFIs, no surprise change orders and output that your fabricator or reviewer accepts without a comments spiral.
  4. 4The bottom lineNearly all factory shed design rework is designed in at kick-off rather than created at the end — fix the inputs, the code basis and the review gate and the rest follows.

Quick answer

In short, factory shed design means delivering cost-optimised steel shed designs with roof trusses, cladding supports and crane runways. The work is governed by AISC 360 and EN 1993, executed on licensed Tekla Structures and checked against a documented QA checklist before issue.

The 7 mistakes that cause most factory shed design rework

After reviewing hundreds of incoming factory shed design packages, the same seven failures account for the overwhelming majority of rework. Each is listed with the fix we apply on our own projects.

  • No agreed design basis — fix: a signed basis-of-design before modeling starts.
  • Wrong code edition — fix: the compliance matrix names the edition, not just the code.
  • Skipping the independent check — fix: every package passes a checker who did not build it.
  • Poor input control — fix: a single register of received documents and revisions.
  • Ambiguous revision control — fix: formal transmittals so the current issue is never in doubt.
  • Underestimating client specifications — fix: operator standards mapped at kick-off, not discovered at review.
  • No constructability review — fix: a fabricator's-eye pass before issue for construction.

A QA checklist you can reuse

Whether you use us or another supplier, hold your factory shed design package to this acceptance checklist before you pay the final invoice:

  • LOD 400 Tekla 3D model — present, complete and revision-controlled.
  • Single-part & assembly shop drawings — present, complete and revision-controlled.
  • Erection & GA drawings — present, complete and revision-controlled.
  • Bolt lists, NC/DSTV & DXF files — present, complete and revision-controlled.
  • Code references (AISC 360) shown on every calculation and drawing.
  • Checker's review record included in the transmittal.

What good looks like

A well-run factory shed design engagement is quiet: few RFIs, no surprise change orders and output that your fabricator or reviewer accepts without a comments spiral. That outcome is designed in at kick-off — through the design basis, the compliance matrix and the review gates — not rescued at the end.

Factory Shed Design — quality & mistakes

7 Common Factory Shed Design Mistakes (and How to Avoid Them): FAQ

What are the most common factory shed design mistakes?

In short, factory shed design means delivering cost-optimised steel shed designs with roof trusses, cladding supports and crane runways. The work is governed by AISC 360 and EN 1993, executed on licensed Tekla Structures and checked against a documented QA checklist before issue.

Which software is used for factory shed design?

We deliver on licensed Tekla Structures, AutoCAD, Navisworks and issue native files plus PDF, DWG and IFC on request.

Which standards do you follow for factory shed design?

We work to AISC 360, EN 1993, IS 800, AWS D1.1, plus client specifications such as Shell DEPs and major operator standards.

How long does a factory shed design package take?

Small packages are typically delivered in 3–7 working days; larger scopes are split into phased submissions agreed at kick-off.

How do I get a quote for factory shed design?

Send your drawings or scope through our quote form — a senior engineer reviews them and returns a fixed-price proposal within 24 hours, free and without obligation.

Pitfall → consequence → fix

What each factory shed design mistake actually costs you

These failures are cheap to prevent and expensive to discover. This is the table our checkers work from when a factory shed design package arrives for review.

Every fix here is a process control rather than extra engineering hours — which is why they cost almost nothing to adopt.

The mistakeWhat it costs youThe fix
01No signed design basisMembers, connections and the single-part & assembly shop drawings are reworked after the first review cycle.Issue a one-page basis of design naming AISC 360, the load cases and the deliverable list before modelling starts.
02Superseded code editionCalculations fail third-party or authority review late in the programme.Record the edition and year in the compliance matrix — never just the code family.
03The modeller checks their own workA single misunderstanding repeats across every sheet of the single-part & assembly shop drawings.Route every package through a checker who did not build the model, and keep the record.
04Uncontrolled input revisionsThe lod 400 tekla 3d model gets built from a drawing that was superseded two weeks earlier.Keep one document register with received date, revision and status for every input.
05Client specifications found lateOperator standards surface at review and force a partial re-issue.Map owner specifications into the compliance matrix at kick-off, alongside the code.
06No constructability passShop queries, fit-up problems and field rework after issue for construction.Add a fabricator's-eye review — access, handling, weld position, erection sequence — before IFC.
07Native files withheldYou cannot revise the work later without paying to rebuild the Tekla Structures model.Write native Tekla Structures file handover into the purchase order, not the closeout email.

Work through this

The factory shed design checklist

Fifteen points, in the order you will need them — from assembling the enquiry to signing off the final transmittal. Tick them here, or copy them into your own project procedure.

15 checks
01

Before you send the enquiry

Everything a supplier needs in order to price accurately.

02

Closing the usual failure modes

The seven pitfalls, turned into gates.

03

Before you accept the package

Fifteen minutes here saves a fabrication hold.

About this guide

How we know this

Written from delivered work
The guidance here comes from live factory shed design packages produced on licensed Tekla Structures, AutoCAD, Navisworks — not from a content brief.
Checked against the governing codes
Every technical statement is cross-read against AISC 360, EN 1993, IS 800, AWS D1.1 and the operator specifications our teams work to daily.
Reviewed through the same checker gate
A senior engineer who signs off factory shed design deliverables reviewed this article, using the independent-check process every client package passes through.
Revised when the standards move
Articles are re-read and re-stamped whenever a governing code edition, software release or client specification changes materially.

2009

Engineering since

1,200+

Projects delivered

40+

Countries served

60+

In-house engineers

Reviewed by

Steel Structures & Detailing practice

Senior engineer, SES steel structures & detailing team

Last reviewed
2 June 2026
Review gate
Independent checker

Working toolset

Tekla StructuresAutoCADNavisworks

Next step

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Read next: What Is Factory Shed Design? A Complete Guide

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