Scheduling Hired Equipment: Cranes and Pumps on the Gantt

Why does hired equipment need its own place on the Gantt?

Construction schedules that run smoothly on paper often fall apart on pour day. The culprit is almost always the same: hired equipment was treated as a background booking rather than a scheduled task, and nobody noticed the conflict until it was too late to fix without paying for standby time. A tower crane window, a concrete pump booking, or an excavator hire is not just a supplier call to make the week before — it is a time-bound activity with predecessors and successors, the same as any construction task on the Gantt. When a concrete pump arrives to a site that is not yet ready for the pour, the contractor pays the pump's standby rate and the crew's waiting time while the clock runs. When the crane is already returned and the lifting work has not started, the whole phase stops. Equipment scheduling on the Gantt turns these events from surprises into visible, manageable constraints.

What types of construction equipment are typically hired for a Thai residential build?

Most Thai residential and small-commercial contractors hire rather than own the heavy equipment they need. Common hire items include tower cranes for multi-storey and condominium work, mobile cranes for steel erection and prefab panel lifting, truck-mounted concrete pumps for slab and column pours, piling rigs and auger rigs for bored-pile foundations, excavators for ground breaking and bulk earthworks, and man-lifts or boom lifts for elevated finishing work. Each has its own booking window, mobilisation time, and minimum hire period. A concrete pump in Bangkok typically needs three to five working days' notice for a weekday slot; a tower crane on a built-up site near major infrastructure may need two to four weeks for permit clearance and a positioning engineer's visit before the first lift happens.

What is the real cost of a mistimed equipment booking?

Equipment standby rates in Thailand vary by machine size and supplier, but even a modest concrete pump carries a standby charge of roughly 3,000 to 6,000 baht per idle hour. A concrete crew waiting three hours because formwork was not ready on pour day costs the contractor not only the standby fee but also three hours of reinforcement and formwork labour sitting idle and a ready-mix truck that may charge a waiting fee of its own. A tower crane kept beyond its booked window because lifting work ran behind can add 8,000 to 15,000 baht per day on a mid-rise project. These costs are predictable and preventable when the equipment booking, the formwork-ready milestone, and the pour date sit together on the Gantt as linked tasks with a named owner for each.

A worked example: Khun Prasert's slab pour in Nonthaburi

Khun Prasert was managing the first-floor slab pour for a five-unit townhouse block in Nonthaburi, valued at 5.6 million baht on a twenty-week programme. He booked a concrete pump for Thursday and scheduled the ready-mix delivery for the same morning. On Tuesday he noticed in SiteBoard's Gantt planning view that the formwork installation task — the direct predecessor of the pour — was still showing 60 percent complete rather than 100. He called the formwork crew lead, confirmed the shortfall, and rescheduled the pump booking to Friday at no extra cost because the supplier had Friday available. Without the equipment task linked to the formwork-complete task on the Gantt, the mismatch would have surfaced on Thursday morning when the pump was on site and the forms were not ready.

How do you link equipment tasks to construction tasks on the Gantt?

Create a separate task bar for each equipment hire window — the concrete pump booking, the crane mobilisation and de-mobilisation period, the excavator hire days. Set the task that requires the equipment as a successor to the equipment-arrival task, and the equipment-return task as a successor to the last activity that uses the machine. This dependency chain means that if the formwork task slips, the Gantt automatically shows the pour task and the pump booking starting too early and flags the conflict before pour day. Assign a named owner to each equipment task so one person is responsible for confirming the booking, monitoring the predecessor tasks, and rescheduling if the window needs to move. In SiteBoard's Gantt planning view, dragging a task bar when a date shifts automatically updates everything linked downstream.

What happens when a supplier changes the delivery date at short notice?

Equipment suppliers in Thailand occasionally confirm a booking and then call two days before to request a date change, particularly for weekend pour slots when demand is high. The moment a supplier requests a change, open the Gantt and identify what moves downstream. If the pour task already has formwork at 90 percent ready, a two-day delay may be absorbable by accelerating the remaining work in the extra time. If the pour is tied to a follow-on structural task or a milestone payment, update the affected tasks and check whether the programme end date shifts. Notify the owner through the on-site progress updates or, if a milestone has moved, through the shared Gantt view, before the owner sees an unexplained gap on the schedule. Communicating an equipment change early is a sign of control, not a sign of failure.

Should the owner see equipment schedules on the owner sharing link?

Yes, and including equipment windows on the Gantt adds real credibility with owners who are not site professionals. An owner who sees a pour task on the shared Gantt, preceded by a pump booking bar and a ready-mix confirmation note, understands that pour day is a coordinated event with multiple moving parts — not a simple calendar commitment. When the pour goes to plan and the owner watching through the owner sharing link sees the task move to complete on schedule, the trust built is disproportionate to the effort of adding a few extra task bars. Owners who can see equipment windows also understand more readily why a supplier date change causes a cascade, which makes any rescheduling conversation far shorter.

FAQ: How far in advance should you book a concrete pump or tower crane in Thailand?

For a standard truck-mounted concrete pump on a residential project in Bangkok or its suburbs, three to five working days' notice is usually sufficient except during peak construction months from October to March, when Friday and Saturday pour slots can book out seven to ten days ahead. For a tower crane on a built-up Bangkok project, allow two to four weeks for positioning survey, permit clearance, and foundation approval before the first lift day. For a bored-pile rig, allow five to seven working days minimum and confirm the access route for the rig carrier. Put the booking confirmation as a separate task on the Gantt as soon as the advance window opens, so the team has a clear visible reminder rather than relying on memory.

FAQ: How do you handle equipment that arrives when the site is not ready?

The answer is always the same: pay the standby rate, finish the preparation as fast as possible, and update the Gantt the same day with what happened and why. Never rush the pour or start a crane lift on an unprepared pad to avoid the standby charge — a hurried pour or an unstable lift creates quality and safety risks that cost far more than a few hours of standby. Identify the root cause of the preparation shortfall, add it as a lesson to the checklist for the next pour phase, and brief the formwork team on the predecessor milestone they must reach before the next booking is confirmed. Use on-site progress updates to log the actual equipment arrival, the standby period, and the eventual pour start so the record sits in the project history.

Building an equipment schedule template that speeds every project

Contractors who add equipment tasks to their Gantt consistently — rather than treating bookings as informal supplier calls — typically see two results after three or four projects: pour days run closer to plan, and standby charges drop sharply. The pattern becomes a reusable block: formwork-ready milestone, pump booking confirmation, ready-mix delivery, pour, curing period start. Copy the block to the next project's slab phase, adjust the dates, and confirm the booking. In SiteBoard's Gantt planning view, this template approach means each equipment window is visible from the start of planning, foremen log real pour start and finish times through on-site progress updates, and the owner watches the coordinated sequence through the sharing link. The equipment plan moves from a mental note held privately by one person to a visible, accountable part of the project schedule — and that shift, compounded across many projects, is what separates contractors who finish on time from those always reacting to the last booking call.