In brief
- Salt-laden coastal air and moisture drive corrosion, so lift, shade and inspect rebar before the pour.
- Ask the supplier for mill certificates and check the bar diameter and surface before it goes into the formwork.
- Fix a rule that any bar with flaking rust or section loss is rejected, and record the decision in the site diary.
Contents
Rebar in Berbera can corrode before it is ever cast into concrete. The coast air carries salt, and a stack of bar sitting on bare ground with no shade will rust. The fix is simple: lift it, shade it, keep it dry and check every bundle before it goes into the formwork.
Why does rebar rust so fast near the coast?
Salt in the air and moisture on the steel drive the corrosion reaction, and the reaction speeds up when the bar is wet, warm and exposed. On a coastal site, humid air can leave a film of moisture on the bar overnight; check local conditions with the site engineer and inspect the stack after humid or wet weather. Surface rust on its own is not always a reason to reject bar, but flaking scale, pitting or a visibly reduced section is. Ask the site engineer to set the acceptance rule before the first delivery, and write it into the inspection record. The general practice is to reject bar with flaking rust or pitting; confirm the exact acceptance criteria against the project specification and the structural engineer's instruction.
How should a Berbera site store rebar?
Lift the bundles clear of the ground and cover them. Stack bar on timber bearers clear of the surface, confirming the required clearance against the project specification, in a shaded area if one is available, with a tarpaulin or plastic sheet over the top. Do not wrap wet bar in plastic; that traps moisture against the steel. Keep the stack away from the sea breeze if the site layout allows, and away from where concrete is washed out. Cut lengths should be bundled and labelled by bar mark so they are not confused when the fixing starts. Ask the storekeeper to record the date each bundle is opened so older stock is used first. Check every bundle against the delivery note before it is accepted onto the stack.
What should you check when rebar arrives?
Check the mill certificate, the bar diameter and the surface condition before the bar is bent or fixed. Ask the supplier for a mill certificate for each heat or batch and keep a copy. Measure the diameter of a sample bar and compare it with the drawing. Look along the length for laps, kinks, deep pitting and heavy flaking. If the certificate is missing or the bar does not match the drawing, put the bundle aside and tell the engineer. Keep a simple delivery log: date, supplier, bar mark, diameter, quantity, and the inspection result. That log is what you show the engineer or client if a question comes up later.
What to do next
Pick one stack of rebar on your site today, lift it onto bearers, cover it, and check the mill certificate against the delivery note. Then write the acceptance rule for rusted bar into the site inspection sheet and ask the engineer to sign it before the next delivery arrives.
Frequently asked questions
Can I use rebar with surface rust in Berbera?
Light surface rust is usually accepted if the bar still meets the specified diameter and the rust brushes off. Flaking scale, pitting or any visible loss of section should be rejected. Ask the structural engineer to confirm the acceptance rule for the project.
How long can rebar stay stored on site before it needs rechecking?
There is no single safe period. Inspect the stack before each fixing operation and after any spell of humid or wet weather. Keep the delivery log so you can see how long each bundle has been on site.
Local reporting: this article is written for building work in Berbera. Ground conditions, prices and rules differ between places; confirm the details for your own site.