How do drawing revisions slip past site teams in Hargeisa?

The gap opens when a drawing is revised but the site keeps building the old version. In Hargeisa, that usually means the revision reached a phone or an email and never reached the printed sheet, the site register or the foreman's brief. The fix is a controlled drawing register, revision checks at each hold point, and one person named on site who stamps and signs out current sheets.

How does a drawing revision get lost between office and site?

Revisions disappear when the site has no single register and no controlled copy.

A common path: the designer reissues a sheet, someone forwards a photo, the photo is blurry or cropped, and the site team keeps the old print because it is the one on the wall. Add a language step, where the brief is given in Somali but the drawing notes are in English, and the change can be missed twice over. On a busy site, the person who received the message may not be the person setting out the work.

The practical test is to ask the site office for its drawing register. It should list sheet number, revision letter, date received, and who checked it against the previous version. If that register is a pile of loose prints, treat every dimension on the wall as unverified until it is checked. Ask whether the designer issues a transmittal note with each revision and whether the site signs it back. That signature is the only proof the change arrived.

What does building from obsolete details look like in the work?

The damage shows up as work that is correct to the old sheet and wrong to the new one.

The mechanism is simple. A revised setting-out dimension, a moved opening, a raised level or a changed reinforcement detail makes the old work a defect even though the crew followed instructions. By the time it is noticed, concrete may be poured, blockwork may be up, or pipes may be buried. Correction then costs demolition and rework, and it can push the following trades out of sequence.

On site, look for these signs:

• Two different revision letters on sheets for the same element.
• Marked-up prints with no date, no initials and no register entry.
• Work that matches a superseded detail while the issued-for-construction set shows another.
• Crews who cannot say which revision they are building to.

Ask the site supervisor to walk a recently completed element and confirm it against the current register. Where the project specification sets tolerances or hold points, confirm them with the project engineer rather than relying on habit.

How do you close the gap before the next pour?

Close it with one register, one holder, and a check before each hold point.

General practice is to keep a master register in the site office, mark each print "controlled copy" with its revision letter and date, and destroy or clearly stamp superseded prints so nobody builds from them. Name one person to receive revisions, update the register and brief the foremen. Record the brief: who attended, what changed, and on which sheets. Before concrete, blockwork or burial of services, check the register against the drawing and sign the check.

Where a revision is unclear or a dimension conflicts, stop and ask the designer in writing. Ask the municipal engineer's office what it requires for record drawings on completed buildings, and whether any submission needs the as-built set. For the contract side, check what your contract says about who bears the cost of work built to a superseded drawing before you agree any position with the contractor.

What to do next

Pull the drawing register in the site office today. Compare every sheet in use against the latest issued set, stamp and remove superseded prints, and write the revision letter and date on each controlled copy. Name the person who receives revisions and gives the brief, then add a register check to the hold point before the next pour or burial.