Scheduling Rented Equipment by Build Phase: What to Bring In, and When to Send It Back

An equipment schedule sets the date each machine arrives on site and the date it goes back, following the actual sequence of work rather than dropping everything on site on day one and returning it all at the end. On a mid-sized job the difference between the two runs into tens of thousands of baht.

People bring everything in early because they are afraid a machine will not be free when they need it. The fear is reasonable; keeping machines on standby for the whole job is not the fix. Book ahead with the dates you want, and have each machine arrive for the window it is actually used in.

The cost of idle equipment is hard to see because it never appears as a new line on the bill. It hides inside the day count of a line that is already there. A machine used for one day but parked on site for eighteen is still billed for eighteen.

Most jobs break into four phases that each use a different group of machines: breaking out, earth and compaction, concrete, and high work with steel. Scheduling against those four phases is the simplest way to cut idle days out of the bill.

The first phase removes what is already there. It is usually the shortest phase and uses the most powerful machines. The main one is an electric breaker at 500 THB per day for slab and render removal, with a concrete saw at 1,000 THB per day where a clean line has to be cut before breaking.

If the work is drilling holes for anchors or conduit rather than breaking, use a rotary hammer instead, from 300 THB per day for the small unit. Getting that distinction right at the start avoids renting the wrong machine, trying it, and swapping later.

There is almost no reason to hold this group past the end of the breaking phase, because the next phases use entirely different machines. This is the earliest and clearest return in the whole schedule.

The thing to allow for here is debris volume, which is always larger than people expect. If the site has nowhere to stack it, the phase stretches while waiting for removal, and those extra days are rental days on a breaker sitting on site.

Once the old material is out, the ground is levelled and compacted before anything is poured. Skipping or under-doing this is what makes a new slab settle and crack later, and putting that right afterwards costs many times the rental.

The main machine is a petrol plate compactor at 750 THB per day, which suits tight areas, footings and corners. For wide areas such as car parks or estate roads, a walk-behind roller at 1,500 THB per day gives a more even finish and works faster.

On house and extension jobs this phase is very short, typically 1-3 days. That makes it another place not to hold equipment. Book it in for the window when the ground is genuinely ready, and return it as soon as the level is right.

These machines run on petrol and diesel, so allow for fuel filled on site, and somewhere dry to keep them. If it rains before the ground is level, work stops but the rental does not, which is worth allowing for in the schedule.

Concrete is the phase that runs the most machines at once, and the only one where a weekly rate usually genuinely wins, because a concrete mixer at 500 THB per day or 3,000 per week has to stay for most of it.

Two machines follow it as a set: a concrete vibrator at 500 THB per day to drive air out of the pour, and a power screed at 1,500 THB per day to level the surface. Both are used only on pour days.

This is where the most expensive mistake on the whole job happens, because the screed and the vibrator get kept for the full duration when they were needed for one day. Holding the power screed for 18 days instead of returning it after one takes that single line from 1,500 THB to 24,000 THB.

If the site cannot supply enough power for this group, add a generator at 500 THB per day into the same window, and book it with the rest rather than calling for it once the site is already stuck.

The last phase is everything done at height: rendering, ceilings, painting and steel erection. Its main item is steel scaffolding at 10 THB per piece per day, or 60 THB per piece per week, the only line billed by piece rather than by machine.

Because it is billed by piece, quantity matters more than duration. Thirty pieces for two weeks is 3,600 THB, while sixty pieces over the same period is 7,200 THB. Estimating pieces against the real height and wall length is what controls this phase's cost.

Where material has to go up repeatedly, compare a mortar hoist at 500 THB per day against the labour of carrying it. Jobs lifting mortar two floors or more, several trips a day, usually come out ahead on the hoist, and it is safer.

Steel erection uses a welding machine at 500 THB per day, generally only while the frame goes up. Book it for the days the welder is actually on site. The full list is on the equipment and pricing page.

Take a mid-sized rear extension estimated at 18 working days, using eight machines that each arrive and leave at different points. This is the schedule and what it actually costs.

Only the scaffolding stays for most of the job, because it cannot be struck and re-erected repeatedly. Everything else comes and goes with its phase. Together the eight machines spend 44 machine-days on site rather than the 144 they would if everything were held throughout.

That 13,600 THB is machine rental only. It excludes cutting blades, fuel for the petrol machines, delivery in and out, which on a job like this means several trips, and the deposit. Delivery has to be asked for, because it is charged by distance and piece count.

The trade-off is real: this schedule needs several truck movements rather than one. If the site is far and per-trip delivery is high, combining some phases may work out better. Compare both versions with actual numbers before deciding.

A good schedule collapses the moment something arrives unusable, because the days lost waiting for a replacement push every later phase back. Inspecting at handover is the best-value five minutes on the whole job.

There are eight things to check. Count the pieces against the delivery note, check cables and plugs for damage, run each machine briefly before signing, and confirm that chisels, blades and attachments are all present.

The other four: check fuel levels on petrol and diesel machines, photograph the condition of every machine, write down the date and time of arrival, and sign after inspecting rather than before.

The one most often skipped is writing down the arrival time, because that date is the first rental day, not the day work starts. Equipment delivered on a Friday evening for a Monday start is three rental days that did no work.

The first mistake is booking everything for day one out of fear that machines will not be free. The better approach is to book ahead with a required date per machine. The team holds the slot without the rental clock starting on day one of the job.

The second is forgetting to return what is finished, particularly single-day machines like the power screed and the vibrator. Make it a site rule that whoever finishes reports it immediately, and book the collection for the next day.

The third is leaving no allowance for rain. Outdoor work in the wet season slips easily, and machines waiting on site keep billing. Put the expensive machines into the windows you can control best.

In short: split the job into four phases, write a separate in and out date for each machine, return things as soon as they are finished, and run the eight-point check at every handover. Rates are on the equipment and pricing page, or talk the schedule through via the contact page.