In brief
- As built drawings fail when records are written at handover instead of during construction, so buried pipes, ducts and cables end up drawn from memory.
- A client can test the record by walking one line on site, asking for the survey book or photograph log behind it, and checking whether the plot plan still matches the built structure.
- Keep attention on record delivery until the marked set and the digital file are handed over and someone has walked the routes.
Contents
As built drawings supervision gaps in Berbera matter because the record of buried services is only as good as the checks made while the trench is open. A supervisor who signs a pour without logging pipe runs, duct routes and cable depths leaves a drawing that describes an intention, not the building. The client then digs blind.
How do weak checks turn into wrong as built drawings?
The gap opens between the work and the record. A pipe is laid, inspected and covered in one shift. If nobody writes the invert level, the chainage, the size and the material into a survey book or photographs the route with a scale rod, the draughtsman reconstructs it later from memory and from the contractor's verbal account. That reconstruction can sit metres from the real line.
Supervision gaps show up in three ways:
- Inspections are signed as passed without a record of what was seen in the trench.
- Buried routes are drawn from the design file and not from the installed line.
- Record drawings are requested at the end of the job, when the ground is closed and the crew has moved.
The mechanism is simple. The drawing inherits the quality of the worst inspection behind it. Where supervision is thin, the drawing becomes a design file with a new date. Confirm site conditions such as salinity, traffic loading and any other factors that affect service design with the project's engineer.
What does a wrong service record cost later?
The first bill arrives when someone excavates. A contractor cutting a drainage trench or a water connection hits a live cable or a pipe that the drawing placed elsewhere. The repair is only part of the loss. The bigger cost is the search: trial pits, ground investigation, downtime and a redesign of the connection route.
A second cost sits inside the building. If the drawing misstates drain falls, duct bends or cable cover, a later extension or a repair crew works on a false plan. Maintenance teams chase a leak along a line that was never there. Records that place a pipe through a wall footing can also hide a structural clash that was built in and cannot now be seen.
The client's own handover file suffers. A facility manager who inherits a wrong drawing cannot plan shutdowns, cannot price a repair and cannot give a contractor a reliable instruction.
Detecting it is practical. Walk one service line on site with the drawing in hand. Measure two points against a fixed reference. Ask for the survey book, photograph log or inspection sheet that backs each point, and look at the date. If the evidence was written in one sitting at the end of the job, treat the line as unverified.
What should a client or supervisor require from the record?
Start with the contract documents. Check what the specification and the contract say about record drawings, the format of the digital file and when they are due. If the contract is silent, agree a written schedule before the next buried service is covered. A useful schedule states who marks the drawing, who checks it, what evidence supports each line and when the client signs it off.
Set a workable rule as general practice: the route is measured, photographed and entered before backfill, then confirmed against the drawing the same week. Confirm the required cover depths and offsets against the project's specification or engineer, since they vary with service type and loading.
A practical handover checklist:
- A marked up set showing the installed line, not the designed line.
- A digital file in the format the contract names, checked by opening it on a machine.
- Survey or photograph evidence behind each buried route.
- A signed statement of who checked what, with dates.
Ask two surveyors or drafting offices for a written scope for an independent record survey, and let them state their own charge. Ask the supplier or the utility owner for the connection drawing it holds. Read the contract's holdback and retention clause to see how record delivery is linked to final payment.
What to do next
Pick one buried service on a current or recent Berbera job. Walk its route with the as built drawing and a tape, and ask the site team for the inspection sheet, survey note or photograph made before backfill. If no dated evidence exists, write to the contractor and the supervising office asking for a record survey of that line, and check the contract for how record delivery links to final payment.
Frequently asked questions
How do I check an as built drawing I have been given?
Measure two points on one service line against a fixed reference and ask for the inspection sheet, survey note or dated photograph that was made before backfill. If the evidence was produced at handover rather than during the work, treat the line as unverified.
Who should hold the record drawings during construction?
Confirm this in your contract and specification before buried work starts, and agree the arrangement in writing with the contractor and supervisor. Check what your contract and specification require.
Can the client withhold payment until drawings are delivered?
Check what the contract says about record drawings, holdback and retention before taking any position. If the contract links part of the payment to record delivery, follow its procedure and get written confirmation from the supervising office.
Local reporting: this article is written for building work in Berbera and Somaliland. Ground conditions, prices and rules differ between places; confirm the details for your own site.