Hiab vs Mobile Crane: Offloading Heavy Precast on UAE Sites
How to choose between a Hiab and a mobile crane for precast delivery in the UAE — unit weights, reach, site access, cost trade-offs, and a clean offloading sequence.
The call usually comes the morning of delivery: “just send it on a Hiab, we’ll sort the rest.” Then the trailer arrives with a 5,800 kg T-wall on the bed, the site has a single forklift rated for two tonnes, and everyone stands around a load nobody can move. The truck waits, demurrage starts, and the next delivery in the convoy backs up behind it.
Offloading is the part of precast delivery in the UAE that gets the least planning and causes the most delay. So here’s how we decide between a Hiab and a mobile crane before the unit ever leaves our yard — by weight, by reach, by access, and by where it has to land.
Hiab or mobile crane — which do you need?
Short answer: match the method to the heaviest unit and the furthest placement. A Hiab (the hydraulic loader crane bolted to the delivery truck) handles lighter units dropped near the verge. A mobile crane is a separate machine for heavy sections or lifts that have to reach over an obstacle or deep into a plot.
The mistake is treating it as a price question first. A Hiab looks cheaper because it’s already on the truck, but if it can’t make the lift, you’ve paid for a wasted trip and a re-delivery on a crane anyway.
What’s the real difference between the two?
A Hiab is part of the delivery vehicle. The unit arrives and offloads itself, no second machine, no separate booking. That’s the whole appeal: one mobilisation, fast turnaround, low cost. The catch is capacity. A loader crane is rated in tonne-metres, and its safe lifting weight drops fast as the boom extends — a unit it lifts easily tight against the truck can be impossible at full reach.
A mobile crane comes as its own unit with an operator and usually a banksman. It costs more and needs setup time, outriggers, and ground that can take the point load. What you buy for that is weight and reach: a mobile crane lifts the sections a Hiab can’t and places them well beyond the truck’s parking line.
| Factor | Hiab (truck loader) | Mobile crane |
|---|---|---|
| Capacity at reach | Light units, falls off with extension | Heavy sections, holds capacity further out |
| Reach | Close to the truck | Well beyond the verge |
| Mobilisation | On the delivery truck — one trip | Separate machine, booked apart |
| Setup | Minutes, deploy and lift | Outriggers, ground checks, lifting plan |
| Ground bearing | Spread over the truck axles | High point loads under outriggers |
| Cost | Lowest — bundled with delivery | Higher — day rate plus mobilisation |
| Best for | Fence bases, footings, single barriers | T-walls, box culverts, deep placements |
How heavy is the precast you’re offloading?
This is the number that decides everything, and most buyers don’t have it to hand. The unit weight, not the product name, sets the method. As a working rule we treat anything above roughly 3 tonnes at usable reach as a mobile-crane lift — below it, in good access, a Hiab usually copes.
Here’s where our own catalogue sits against that line:
A single jersey barrier at 2,400 kg or a precast manhole at 2,500 kg sits under the line — a Hiab drops those near the truck without fuss. A box culvert section at 3,500 kg and a T-wall at 5,800 kg sit over it. Those are mobile-crane lifts, and the blue bars are the units where we’ll tell you up front not to count on a loader crane.
How does site access decide the method?
Even when the weight says Hiab, the access can overrule it. A loader crane lifts close to the truck, so if the unit has to land 15 metres inside a plot, behind a hoarding line, or down a level, the Hiab can’t reach and you’re back to a mobile crane regardless of weight.
Three things we check before committing:
- Reach to the drop point — can the truck park within the loader crane’s working radius, or does the unit need placing somewhere the boom won’t stretch?
- Ground bearing — a mobile crane puts high point loads through its outriggers. Soft fill, a buried service, or a basement slab below needs mats and a check before the lift.
- Overhead and swing room — power lines, scaffold, and adjacent structures shrink the safe lifting envelope on a tight Dubai or Sharjah plot.
Get those wrong and a lift that looked routine turns into a half-day of repositioning. We’d rather size the crane to the real access than the optimistic one.
What does each method cost, and who arranges it?
A Hiab offload is the cheapest path because it rides on the delivery truck you’re already paying for — no separate machine, no second mobilisation. A mobile crane is a day rate plus mobilisation, and on a congested site it can rival the cost of the units it’s lifting.
That’s why it shouldn’t be a surprise on the morning of delivery. We confirm the method when we quote: our own Hiab fleet for units within capacity, and a coordinated mobile crane with a lifting plan for the heavy sections. For a run that mixes both — a barrier line plus a few T-walls — we sequence the convoy so the crane lift happens once, not piecemeal across trips.
On any mobile-crane lift the paperwork is real. A lifting plan covering load weight, ground bearing, the exclusion zone, and the appointed person follows BS 7121 (safe use of cranes) and the LOLER lifting regulations, and most UAE main contractors and municipalities want it before anyone hooks on. Heavy or over-width loads also need an RTA heavy transport permit for the road move itself.
Frequently asked questions
Can a Hiab offload precast concrete? Yes, for lighter units within its reach-limited capacity — fence bases, light footings, single jersey barriers, small manholes dropped close to the truck. Once the unit is heavy or the placement is far from the verge, you need a mobile crane.
What is the difference between a Hiab and a mobile crane? A Hiab is a loader crane mounted on the delivery truck, so it offloads without a separate machine. A mobile crane arrives separately, lifts far heavier loads, and reaches further, but adds cost and setup time.
How heavy a precast unit can a Hiab lift? It depends on the reach — a loader crane’s rated capacity falls sharply as the boom extends. As a working rule we treat units above roughly 3 tonnes at any real reach as a mobile-crane lift.
Who arranges the crane for precast delivery in the UAE? Agree it before the truck leaves. We supply with our own Hiab for units within capacity and coordinate a mobile crane and lifting plan for heavier sections, so the offload isn’t left to chance on arrival.
Do I need a lifting plan to offload precast? For a mobile-crane lift on a UAE site, yes — covering load weight, ground bearing, exclusion zone, and the appointed person, per BS 7121 and LOLER. Most contractors and municipalities require it before the lift.
The call we get most is 'just send a Hiab.' Then a 5,800 kg T-wall lands at the gate and nothing on site can lift it off. Pick the offloading method off the unit weight and the reach, not the cheapest truck — a wrong lift stalls the whole delivery sequence.
Get your delivery and offload quoted together
Tell us the units and quantities, the heaviest single piece, where on site it has to land, and the access — gate width, ground type, any overhead. That’s enough for us to set the right offloading method, price the Hiab or the crane, and sequence the convoy so nothing waits at your gate.
