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Quality & Mistakes · Lifting & Rigging Calculations

7 Common Lifting & Rigging Calculations Mistakes (and How to Avoid Them)

Buyers of lifting & rigging calculations 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.

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Key takeaways3 min read3 sections

The short version

  1. 1The 7 mistakes that cause most lifting & rigging calculations reworkAfter reviewing hundreds of incoming lifting & rigging calculations 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 lifting & rigging calculations package to this acceptance checklist before you pay the final invoice:
  3. 3What good looks likeA well-run lifting & rigging calculations 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 lifting & rigging calculations 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, lifting & rigging calculations means calculating lifting lug, spreader and package lifting loads for safe installation. The work is governed by AISC 360 and ASCE 7, executed on licensed STAAD.Pro and checked against a documented QA checklist before issue.

The 7 mistakes that cause most lifting & rigging calculations rework

After reviewing hundreds of incoming lifting & rigging calculations 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 lifting & rigging calculations package to this acceptance checklist before you pay the final invoice:

  • Analysis model & load combinations — present, complete and revision-controlled.
  • Design calculation report — present, complete and revision-controlled.
  • Connection design sheets — present, complete and revision-controlled.
  • Foundation load & design report — 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 lifting & rigging calculations 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.

Lifting & Rigging Calculations — quality & mistakes

7 Common Lifting & Rigging Calculations Mistakes (and How to Avoid Them): FAQ

What are the most common lifting & rigging calculations mistakes?

In short, lifting & rigging calculations means calculating lifting lug, spreader and package lifting loads for safe installation. The work is governed by AISC 360 and ASCE 7, executed on licensed STAAD.Pro and checked against a documented QA checklist before issue.

Which software is used for lifting & rigging calculations?

We deliver on licensed STAAD.Pro, RAM Connection, Foundation Advanced and issue native files plus PDF, DWG and IFC on request.

Which standards do you follow for lifting & rigging calculations?

We work to AISC 360, ASCE 7, EN 1993, IS 800, ACI 318, plus client specifications such as Shell DEPs and major operator standards.

How long does a lifting & rigging calculations 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 lifting & rigging calculations?

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 lifting & rigging calculations mistake actually costs you

These failures are cheap to prevent and expensive to discover. This is the table our checkers work from when a lifting & rigging calculations 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 design calculation report 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 design calculation report.Route every package through a checker who did not build the model, and keep the record.
04Uncontrolled input revisionsThe analysis model & load combinations 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 STAAD.Pro model.Write native STAAD.Pro file handover into the purchase order, not the closeout email.

Work through this

The lifting & rigging calculations 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 lifting & rigging calculations packages produced on licensed STAAD.Pro, RAM Connection, Foundation Advanced — not from a content brief.
Checked against the governing codes
Every technical statement is cross-read against AISC 360, ASCE 7, EN 1993, IS 800, ACI 318 and the operator specifications our teams work to daily.
Reviewed through the same checker gate
A senior engineer who signs off lifting & rigging calculations 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

Structural Analysis & Design practice

Senior engineer, SES structural analysis & design team

Last reviewed
25 February 2026
Review gate
Independent checker

Working toolset

STAAD.ProRAM ConnectionFoundation Advanced

Next step

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