The most expensive phone call in concrete pumping is the one from an operator standing next to a boom truck that can't set up. The concrete is batched, the crew is on the clock, and the truck physically cannot do its job. Almost every one of those calls was preventable with five minutes of access checking at booking stage.
Here's what a boom pump actually needs, and how we check it before your pour so that call never happens.
The parking footprint
A truck-mounted boom pump is a serious vehicle — think semi-trailer weight on a rigid chassis. To work, it needs to park and stay parked, which means:
- Length: allow roughly the space of a truck plus room at the rear for agitator trucks to reverse up to the hopper. On a narrow street, that can mean traffic management or a road occupancy permit.
- Width: the vehicle itself, plus outriggers. Fully extended, outriggers can more than double the truck's footprint — a boom that needs full outrigger spread wants most of a residential street's width.
- Height: watch for entry constraints — carpark clearances, tree canopies over driveways, and the unfolding room the boom needs above the truck.
On new-estate streets this is usually easy. In the inner suburbs it's the first thing we check, and it's why some inner-city jobs run line pumps even at volumes where a boom would normally win.
Outriggers and ground conditions
When the boom extends, the truck's weight transfers to four outrigger pads — and the point loads are enormous. The ground under them has to take it:
- Firm, level, compacted ground. Sealed road, crossover or compacted crushed rock is ideal.
- Beware of hidden voids. Freshly backfilled trenches, septic tanks, stormwater pits and shallow services can all sit under an innocent-looking verge. Tell us what's below.
- Soft ground needs bog mats or engineered pads — possible, but it's a plan, not an improvisation.
- Slopes matter. Booms level within limits; a steeply crowned road or sloping driveway may restrict where we can stand.
Powerlines — the non-negotiable
Energy Safe Victoria's no-go zone rules set strict minimum clearances between plant and overhead electrical assets. For typical distribution lines, unauthorised plant operation near the lines is prohibited within defined envelopes; near transmission lines the distances are larger again. In practice, for a boom pump this means:
- We map every overhead line near the set-up position before pour day.
- If the boom's working arc would breach a no-go zone, we re-position, use a spotter under the permitted framework, or switch the job to a line pump.
- No operator of ours will ever "just be careful" near power. It's not a judgement call; it's a rule.
If your street has poles and wires on the pour side, mention it in the first phone call. It changes the plan more often than any other single factor.
The boom's reach envelope
Boom reach is quoted as vertical and horizontal maximums, but the working envelope is a curve, not a rectangle — and the last few metres of a boom's reach are its least flexible. Good practice is to park so the pour sits comfortably inside the envelope, not at its edge. That's also why "just park out front" sometimes isn't the answer: two metres of repositioning can turn a strained set-up into an easy one.
When you book, we'll ask for the distance from the likely truck position to the furthest point of the pour, including height. Measure generously and tell us about anything the boom must clear on the way — buildings, scaffold, trees, cranes.
What we check before every boom job
- Satellite and street view of the parking position and approach route
- Overhead assets on the pour side and the approach
- Ground conditions where the outriggers will land
- The reach from truck to furthest pour point, with obstacles
- Whether permits or traffic management are needed — flagged to you at quote stage, never after
For anything unusual, we'll do a drive-past. It costs us half an hour and saves everyone the worst version of pour day.
If the boom won't fit
It's not the end of the job — it's just a different job. Long-reach line runs handle most "boom won't fit" scenarios; see how far a line pump can reach for what's possible. The cost comparison sometimes even favours the line once permits and traffic management come into the boom's column.
Planning a pour and unsure about access? Send us the address and a couple of photos — we'll tell you within a day whether a boom sets up cleanly, and what the plan B looks like if not.