Pictured above: an upright standing on its base plate on a cracked, patched concrete slab beside a floor drain, from our project archive (V5-1). This is what a survey looks at on the floor, because the base plate can only be as good as the concrete under it.

Before any racking is drawn or priced, someone has to stand in your warehouse and measure it. That visit is the site survey. It is the first step of every project we do, and it is where the hard constraints come out, which is far cheaper than finding them in the middle of an installation.

This is what happens on that visit, what each measurement changes in the design, and what you can have ready so the quotation is built on facts rather than assumptions.

What the survey is, and what it costs

We do not quote from a phone photo, a sketch or a spec sheet. Every project starts with a physical visit: we measure the floor, check the slab, log your forklift's turning radius and audit your SKU and pallet mix. We spend up to 60 minutes on site measuring, auditing and talking it through.

The initial survey is free for serious enquiries. If the project goes ahead we deduct nothing, and if you decide to use another contractor there is no charge for our time. The one thing we ask is that you do not bring us out for window-shopping unless you genuinely intend to install. Smallest installs run around 20 to 50 pallet positions; for a budget under about S$5,000 the scope does not justify a survey, and we would point you to a local shelving supplier instead.

What we measure, and the decision each number feeds

1. The floor and the slab

We walk the floor and look at its footprint, its joints, its cracks and patches, and anything sunk into it such as drains and trenches. Then we check the slab capacity, not the gross floor loading allowance.

That decides the base plates and fixings. A 25 MPa slab takes typical selective racking loads without complaint. Drive-in and VNA racking put higher point loads through each base plate, and sometimes the slab needs reinforcement or thicker base plates. If the work is VNA, the floor also has to pass a flatness survey before anything is ordered. A survey that never looked at the floor has left that question for later, and later is where the extra cost turns up. What gets checked before anyone drills is covered in anchoring pallet racking to the floor.

2. Columns, at floor level

We measure column centres at floor level, and the base dimensions including any concrete encasement. A column drawn as a small square on the landlord's plan can be much wider where it meets the floor, and that is where your frame has to sit and your anchors have to go. The measurement decides the bay pitch, and whether a column lands on a frame line or in the middle of a bay. Designing a racking layout around columns explains why that matters so much.

3. Height, measured to the lowest obstruction

Clear height is not the height of the roof. We measure to the lowest obstruction: sprinkler heads, beam soffits, lighting and HVAC. That number sets how many beam levels fit, where the top beam can go and how much clearance the sprinklers need, and it is one of the things most likely to change a layout late if nobody looked. If the unit is sprinklered, tell us before the visit and we will find the heads.

4. Your forklift, not the published minimum

We audit the fleet: counterbalance, reach or VNA, and the maximum lift height. The aisle is sized from the truck you actually own. As a guide, counterbalance forklifts need 3.5 to 4.0 m aisles, reach trucks 2.4 to 2.8 m and VNA trucks 1.6 to 1.8 m. We log the real turning radius and model it into the aisle width rather than use the manufacturer's minimum. If you can have the truck and its driver there, an hour on site shows more than a data sheet. See forklift turning radius and aisle width for how that plays out in a layout.

5. What goes on the racks

We review the SKU and pallet mix and profile the weights. The catalogue rating is what a beam holds under ideal conditions; the real-world rating is 70 to 80 per cent of it, to allow for impact damage, off-centre loading and corrosion, and we design to the real number. We size against the heaviest pallet you run, not the average. If only a few lines are that heavy, they can often be kept in their own bays or on lower levels rather than rating every bay for them, and that is decided here.

6. The regulatory envelope

We note the sprinklers and the exits, and whether the design will need a PE stamp or a submission. Standard pallet racking under 9 m generally does not need a BCA submission, but PE-stamped structural calculations are required above certain heights, where racking is integrated with a mezzanine, or where it supports walkways. Better to know at the survey than at the fabrication stage.

What to have ready

None of this needs paperwork you do not have. These are the answers that make the visit useful:

• The floor area, and whether the unit is sprinklered.
• The pallets you need to store now, and roughly how many in two years.
• The pallet sizes, including what your suppliers deliver on, not only your own.
• The heaviest unit load as a weighed figure, not a guess.
• The forklift type and maximum lift height, ideally with the truck available.
• Any structural drawings or landlord conditions for the unit, and your lease start or move-in date.

Where the answers are missing, we work from what we measure, but a quotation built on assumptions gets revisited later at a worse time.

What you get afterwards

A written quotation, backed by a 2D and 3D layout with bay-by-bay pallet positions, beam load tables and aisle widths. Prices are quoted after the survey, because the same selective bay can vary by 50 to 80 per cent depending on the load case. The indicative per-bay ranges are on our pallet racking cost guide, and the stages that follow the survey are in how a racking project runs from survey to handover. Standard installations typically run four to six weeks, survey to handover.

The survey sometimes ends with the answer that you do not need new racking: rack inspection and selective beam replacement can be the right fix, and for a small store boltless shelving may be the better answer. We would rather say that at the survey than sell you steel you do not need.

Reading a quotation from someone else

If you are comparing suppliers, ask each one the same three things. Did anyone walk the floor? Was the clear height taken to the lowest obstruction, and were column bases measured at floor level? Was the slab checked for the loads the design puts through it? A layout claiming no loss around the columns is usually one drawn where the columns were small squares. The number that matters is the positions the layout actually delivers and whether whoever produced it walked the floor.

The short version

• The survey is free for serious enquiries, takes up to 60 minutes on site and carries no obligation.
• We measure the floor and slab, columns at floor level, height to the lowest obstruction, your forklift, your heaviest pallet and the regulatory envelope.
• Each number changes something: base plates, bay pitch, beam levels, aisle width, load class, PE stamp.
• Bring the weighed heaviest pallet, the forklift type and lift height, and the pallet sizes your suppliers use.
• Ask any other supplier whether they walked the floor.

Message us on WhatsApp to book a site survey, or see the pallet racking systems we install and our full service list. Prices for your job are quoted after the survey; the figures in this article are the ones we publish and are indicative, not a quotation.