Factory & Warehouse Specifications Explained: Power, Clear Height, Floor Loading and Container Access

“Power: 1,000 amps. Clear height: 10 metres. Heavy-duty floor. Container accessible.” Those four lines can describe a capable facility—or four expensive misunderstandings. Industrial specifications only become useful when the measurement point, operating condition, documentary source and responsible party are stated. Use the checks below to convert a listing into an engineering brief. They are general information; the final assessment must come from appropriately registered engineers, licensed surveyors, fire consultants, the local authority and utility providers for the specific property.

Power is a system, not an amp number

Start with the operation. List every machine, charger, chiller, compressor, office load and future line. Record rated load, starting current, duty cycle, simultaneous use, sensitivity to voltage dips, harmonic output and backup requirement. Then ask an electrical consultant to calculate connected load and maximum demand. A bare amp figure does not tell you the supply voltage, phase, power factor, usable spare capacity or whether the figure describes a main switch rating rather than an approved supply.

TNB’s Electricity Supply Application Handbook separates supply schemes by maximum demand and voltage. Its published ranges include 400/230V low-voltage supply, 11kV for specified medium-voltage demand and 33kV for larger demand; every scheme remains subject to the applicable network and application requirements. TNB also states that applications above 100A are submitted by an electrical consultant engineer registered with the Board of Engineers Malaysia and that a new substation may be required.

For an existing building, collect 12 months of bills, maximum-demand records, the supply agreement, single-line diagram, transformer and switchgear nameplates, protection settings, maintenance logs and any Energy Commission registration. Have the consultant trace ownership from the TNB intake to your final distribution board. The Energy Commission’s Electricity Regulations require competent-person inspection for specified installations, with the required competency depending on voltage. Operator inference: the right question is not “How many amps?” but “Can this documented installation safely run this load profile, and what must be upgraded before commissioning?”

Clear height must be measured where storage and production happen

Clear height is the smallest usable vertical dimension in the working zone, not automatically the height at the roof ridge. Agree the reference points in writing: finished floor to the underside of the lowest structural member, sprinkler, duct, cable tray, light fitting or crane component. Measure on a grid. Portal frames often create different heights at the eaves, haunch and ridge; services or later alterations can become the controlling obstruction.

Translate height into an operating layout. For racking, allow for the rack frame, top load, handling clearance, sprinkler arrangement and the forklift’s actual lift envelope. For production, plot cranes, exhaust, process piping, maintenance access and safe working zones. Also measure roller-shutter and dock-door openings: a tall internal volume does not help if equipment or loaded vehicles cannot enter.

Do not move sprinklers or cut structure to recover height on a sketch. BOMBA’s Fire Services Act process assesses firefighting equipment and fire-safety installations in relation to the use of a designated premise. The Uniform Building By-Laws framework covers plan submission, structural plans, fire requirements and the CCC process, while the Local Government Department cautions that the enforceable UBBL version is the one gazetted by the relevant state. Have the architect, structural engineer and fire consultant check proposed changes against approved drawings and current authority requirements.

Floor loading has at least four different meanings

Ask what the advertised floor-loading number represents. It may refer to a uniformly distributed load over a broad area. Your operation may instead impose concentrated machine feet, rack-upright point loads, forklift wheel loads or dynamic impact. Those load cases are not interchangeable. Slab thickness alone also does not establish capacity: reinforcement, concrete strength, joints, sub-base, ground conditions, deterioration and previous cutting all matter.

DOSH’s warehouse guidance is unusually direct. It says racking should be installed on sound, level floors capable of withstanding the point loading at every base plate. If a rack is tied to a building, the supporting members should be proven by structural calculations. It also says safe working loads and equipment tolerances should be set by the designers and manufacturers, aisles should suit the mechanical-handling equipment, and maximum-load notices should be displayed and respected.

Give a structural engineer the real load schedule: maximum pallet mass, beam levels, rack layout and base-plate reactions; machine weights, footprints and vibration; forklift laden weight and wheel data; any mezzanine loads; and the location of trenches or pits. Supply as-built structural drawings, calculations, concrete test data and repair records where available. The engineer may recommend scanning, cores, load testing or geotechnical work depending on evidence and risk. Operator inference: “five tonnes per square metre” without a load case, drawing reference and engineer’s confirmation is not a usable specification.

Container access begins at the public road, not the loading bay

Map the entire movement from the public network to the final parked position. Check legal access and road restrictions first, then measure junctions, guardhouse geometry, gate clear width and height, kerbs, drains, gradients, overhead cables, canopy edges, yard depth, dock offset and exit path. Repeat the review with cars parked, shifts changing and outbound vehicles queued—the condition during a quiet viewing is rarely the design condition.

Use the vehicle you will actually operate. JPJ’s commercial-vehicle approval specification records overall length, width and height, wheelbase, front and rear overhang, kerb-to-kerb and body-to-body turning circles, axle ratings and design gross vehicle weight as separate inputs. That is a useful checklist because a generic “40-foot container access” label says nothing about tractor configuration, swept path, vertical clearance or pavement/bridge capacity.

Have a transport or civil engineer run a swept-path analysis using the intended vehicle data, then conduct a controlled physical trial if the owner and site rules allow it. Check whether the vehicle can enter, align, open doors, dock, uncouple where required and leave without reversing into public traffic or crossing an unverified drain cover. Obtain written clarification from the PBT, road authority or estate manager where route restrictions, private-road rights or maintenance limits are uncertain.

Convert every specification into an acceptance schedule

Create one schedule with five columns: claimed specification, measurement definition, source document, verifier and pass/fail condition. For power, attach the load study, bills, single-line diagram and TNB/consultant response. For height, attach a measured survey showing every controlling obstruction. For the floor, attach the engineer’s assessment against the rack, machine and forklift loads. For access, attach the vehicle data, route plan, swept path and trial record.

Then price the gap. Include utility connection charges, substation or switchroom work, consultant fees, approvals, structural strengthening, slab repairs, sprinkler changes, door works, yard reconstruction and operational downtime. TNB’s own supply process lists connection charge, security deposit and stamp duty among initial payments and notes that supply timing depends on load, location and authority approval. This is why an upgrade should be a scoped project, not a casual allowance.

For a purchase, put critical results into the offer’s due-diligence conditions. For a lease, state the landlord works, tenant works, completion evidence, testing standard, handover date mechanics and remedy if a specification fails. Have a licensed property lawyer draft those terms and the relevant registered engineers certify technical acceptance. A listing describes a possibility; an acceptance schedule defines the facility you are actually agreeing to take.