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Let’s discuss your requirements and see how our expertise in Construction Verification can help on your next project.

Plowman Craven has more than 50 years’ experience providing integrated measurement and consultancy services to the property and infrastructure markets.

Talk to our expert

01582 765566
webenquiry@plowmancraven.co.uk

Construction Verification

Valuing Verification

Our Construction Verification services enable clients to mitigate some of the ever-present and costly delay, RFI’s, re-works, package creep, legal and financial variations that affect projects by precisely auditing and recording what has been constructed against what was designed. This is performed through laser-scanning using our state-of-the-art Leica equipment.

By providing clients with documented, independent certification of the positional accuracy and content of installations, Construction Verification represents an ‘insurance policy’ against potential variation claims as well as a method of proving conformance to contractual tolerance set by the design teams.

Our Construction Verification surveys include setting-out and floor-flatness assessments in a range of environments – such as logistics warehouses.

Bim Grid Verification Warehouse Logistics

Viable Verification

Plowman Craven offer a number of independent verification options that look to either verify the as-built condition on site to satisfy client verification requirements, or instead de-risk the design intent through verifying the geospatial assumptions made.

We are well placed to provide this independent assessment through our 50 years of survey experience, paired with our market leading BIM Centre of Excellence (holding BSI BIM Kitemark). We generally recommend either;

  • A ‘quick touch’ reporting approach, usually undertaken in a short duration which aims to highlight, in our opinion, the key discrepancies between the design intent and as-built condition.
  • A detailed and rigorous approach, undertaking a full review of all as-built elements and comparing their type and position (translation and rotation) in comparison to the design intent. We utilise a RAG (Red Amber Green) rated system to illustrate conformance to agreed tolerances.

To ensure that we capture all elements within the site, it is sometimes necessary to attend site multiple times once key milestones are reached, e.g. pouring of Slab Completion, post-erection of primary frame, post-installation of upper floor steels and deck, completion of first fix.

Bim Warehouse Tolerance

Visualising Verification

An example of a typical project tolerance criteria is as follows;

A comparison analysis will be undertaken through a Red, Amber, Green System, enabling clear illustration of whether the permissible tolerances have been achieved, are close to the permissible limit, or not compliant;

  • Red – Not compliant; Identified if deviation is less than 0% or greater than +2% of the defined critical dimensions.
  • Amber – Close to permissible limit; Identified if deviation is between +1.0% to +2% of the defined critical dimensions.
  • Green – Compliant; Identified if deviation is between 0% to +1% of the defined critical dimensions.
Critical dimensions comparison - survey vs design
Critical dimensions comparison - survey vs design
Capturing the as-built condition
Capturing the as-built condition
RAG rated tolerance definition
RAG rated tolerance definition

How Can We Help?

Let’s discuss your requirements and see how our expertise in Construction Verification can help on your next project.

Plowman Craven has more than 50 years’ experience providing integrated measurement and consultancy services to the property and infrastructure markets.

James Gregory

Talk to our expert

01582 765566
jgregory@plowmancraven.co.uk

James Gregory
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