In brief
- A low rebar bending bid usually means the bidder left out a task, assumed generous bar lengths, or priced one fixing method when the drawing needs another.
- Ask for a bar bending schedule with weights and shapes, not a single lump sum, and compare it with the structural drawings line by line.
- Confirm overlap lengths, hook and bend diameters, and tolerances against the project specification or engineer before you compare prices.
Contents
A rebar bending bid in Garowe comes in low when the bidder has priced less work than the drawings and specification require. The gap shows up as omitted bar marks, wrong bar geometry, generous allowances for laps and hooks, or a cutting and fixing method that does not match the site. The price looks competitive because the scope is smaller, not because the work is cheaper.
What gets left out of a low rebar bending bid?
The bid usually leaves out the tasks that are hard to see in a lump sum. Ask for a bar bending schedule with bar marks, diameters, lengths, shapes and weights per member. Compare it against the structural drawings and the specification clause by clause.
Common omissions in a rebar bid can be:
- Lap lengths and starter bars. Extra length at every lap adds weight and cutting time.
- Hooks, bends and couplers. Standard hook and bend dimensions consume bar that a straight-line take-off misses.
- Spacers, chairs and tying wire. These are separate supply items.
- Cutting and bending on site or at a yard. Transport, wastage and re-bending rejected bars.
- Fixers for the pour. A bid may price steel supply only and leave fixing to the main contractor.
If the schedule does not list a bar mark, ask who is supplying that bar and at what length. A bid without a schedule is a bid you cannot compare. Confirm bar diameters, bend diameters, hook lengths and tolerances against the project's specification or engineer, not against general practice.
Where do cost assumptions break down?
Cost assumptions break when the bidder prices a drawing that is not the one being built. A bending schedule is only as good as the bar geometry behind it, and small changes to bends and laps move the tonnage.
Check the geometry in the bid against the structural drawings:
- Bend diameters. The internal bend diameter depends on the bar diameter and the specified bend. Confirm it with the engineer.
- Hook type. A 90 degree hook and a 135 degree hook use different lengths of bar.
- Lap positions. Laps at the same location can force longer bars than a staggered arrangement.
- Member sizes. A dimension taken from the architectural drawing may not match the structural one.
A bidder who assumes straight bars and adds a percentage for bends will underprice curved and cranked bars. Sit with the bidder and the engineer, open the drawings, and walk through one column and one beam together. Agree the bar list, the weights and the wastage allowance in writing before you compare prices. Wastage and lap allowances are project figures; take them from the engineer or the specification.
How do you catch the gap before you award the work?
You catch the gap by checking the bid against the schedule, the drawings and the site, before the award. Do not compare two lump sums and pick the lower one.
Ask for and check:
- A priced bar bending schedule with bar mark, diameter, shape, length, number of bars and weight per member.
- The source of the steel. Ask which mill or supplier and request the mill certificates with the delivery.
- The bending method. Yard bent or site bent, and who supplies the bending equipment and the fixers.
- Sample bars. Ask the bidder to bend one sample of the largest and smallest diameter in the schedule and check the bend diameter against the engineer's requirement.
- Test records. Request recorded results from the bidder's recent work and confirm them with the engineer.
If the bid is far below the others, ask the bidder to list what is excluded. A bid that names its exclusions is easier to compare than one that stays silent. If the bid cannot be reconciled with the schedule, ask the municipal engineer's office for guidance on the approval route, or ask the engineer to confirm the scope before you sign. Check what your contract and payment terms allow before you commit to a deduction or a variation.
What to do next
Ask each bidder you invite to quote for a priced bar bending schedule with weights and shapes, plus a written list of exclusions. Put the schedule beside the structural drawings and the specification, and mark every bar mark that has no price. Do not award the work until the exclusions are closed and the engineer has confirmed the bar list.
Frequently asked questions
Should a rebar bending bid be a lump sum or a priced schedule?
Ask for both. A lump sum hides what is left out, while a priced bar bending schedule with bar marks, diameters, shapes, lengths and weights lets you compare bids line by line against the drawings and specification.
How do I know if the lap and wastage allowances in a Garowe rebar bid are fair?
Take the lap and wastage figures from the project specification or the engineer, not from the bidder. Check what your contract allows before you accept or adjust a figure in the bid.
Who confirms the required bend diameters and hook lengths for a Garowe building?
The structural engineer confirms them for the project. Confirm the values against the project's specification or engineer, not against a default from another job.
Local reporting: this article is written for building work in Garowe and Puntland. Ground conditions, prices and rules differ between places; confirm the details for your own site.