Small Warehouses and Light Industrial: Forklifts, Racking and Docks

Why this matters

A small warehouse looks empty and simple to a tech used to houses: concrete floor, steel racks, a few doors, a high ceiling. It is neither. Forklifts are moving loads that weigh more than your truck, driven by operators who often cannot see what is directly in front of or behind them. The racks hold tons on beams that were designed for a load and a configuration, not for your ladder or your conduit strap. The dock edge is a fall, and a trailer at the dock can move. And most of the equipment you came to fix is 20 feet or more overhead. Every one of those is a way a residential habit gets someone hurt.

How the floor is laid out

Most small warehouses follow the same basic plan: dock doors on one wall, a staging area behind them, a main forklift lane across the building, and racking in rows with aisles between them. The office and break room sit to one side, usually with a painted pedestrian walkway connecting them.

       TRAILERS (outside, backed to doors)
  +---[D1]-----[D2]-----[D3]---+-----------+
  | dock plates / levelers     | SHIPPING  |
  | STAGING: forklifts turning | OFFICE:   |
  |                            | sign in,  |
  |                            | get vest  |
  +-------------X--------------+-----------+
  | MAIN LANE: forklifts, both directions  |
  +---------------------------+--X---------+
  | RACK A  [][][][][][][]    | PEDESTRIAN |
  | AISLE 1: forklifts only   | WALKWAY,   |
  | RACK B  [][][][][][][]    | painted    |
  | RACK C  [][][][][][][]    | lines,     |
  | AISLE 2: forklifts only   | leads to   |
  |   heater at 24 ft above   | break room |
  | RACK D  [][][][][][][]    |            |
  +---------------------------+------------+
  X = marked pedestrian crossing point

What the diagram is telling you: the pedestrian walkway is yours, the aisles and the main lane are the forklifts', and you cross from one to the other only at the marked crossing points, after making eye contact with any operator nearby. The equipment you need to service, here a unit heater above aisle 2, is often over the forklift path, which means the aisle has to be closed while you work.

Forklifts cannot see you

OSHA's powered industrial truck standard, 29 CFR 1910.178, requires the employer to train and evaluate operators, with a re-evaluation at least every three years. That standard binds the warehouse as the operator's employer, not you, but its effect is on you: a trained operator still has blind spots, and a forklift carrying a tall load forward or running in reverse may have almost no forward view.

What this means for a tech on the floor:

• Assume the operator has not seen you until you have made eye contact and they have acknowledged you.
• Never walk behind a forklift. Reverse travel is common and many lifts give only a beeper as warning.
• Never stand under a raised load or forks, even empty forks.
• Stay on the pedestrian walkway, and cross only at marked crossing points.
• Do not leave equipment, ladders or cords in a forklift lane. An operator focused on placing a pallet will run over your extension cord or hit your ladder.
• Do not ask an operator to lift you on the forks or on a pallet. It is prohibited under the same standard unless a platform designed for it is used, and it is not how you get to a ceiling.

Racking: do not lean on it, climb it or attach to it

Pallet racking is engineered steel: uprights (the vertical frames), beams (the horizontal members that hold pallets), and bracing. It is designed to a load capacity and a specific configuration, usually to the ANSI MH16.1 specification, and many warehouses post a load plaque on each rack row. It is not a structure for anything else.

• Do not lean a ladder against racking. A ladder footing that shifts a beam or loosens a beam lock can drop a pallet.
• Do not climb racking, even "just one level."
• Do not attach anything to racking: conduit, cable tray, unit heater hangers, strut, signs, cable ties for your extension cord. Drilling or clamping changes the member's capacity and can void the rack's design.
• Report damage. If you see a bent upright, a dented beam, a missing beam lock or a frame pulled out of its floor anchor, tell the site contact immediately. Racks damaged by forklift impact are a common collapse cause, and the warehouse may not know.

In-rack sprinklers and flue spaces. Many warehouses have sprinkler heads inside the racking and rely on open vertical gaps between pallets, called flue spaces, for sprinkler water and heat to move, under NFPA 13 in the edition the local authority has adopted. Do not block flue spaces with materials, and do not hang or strap anything to in-rack sprinkler piping.

Docks and trailers

The dock is where warehouse injuries concentrate, and a tech servicing a dock door, a leveler or a door seal is standing in the middle of it.

• The dock edge is a fall. With no trailer at the door, the edge is a drop of about 4 feet to the drive. Do not walk to the edge of an open door, and do not work at an open door without a barrier or with your back to the edge.
• Trailers can move. A trailer at the dock can creep away from the dock as a forklift drives in and out, or be pulled away by a driver who did not know someone was inside. Under 1910.178, the employer must have the truck's brakes set and wheel chocks placed before a powered industrial truck boards it, and many docks add a vehicle restraint that hooks the trailer's rear bumper. Do not enter a trailer unless it is restrained or chocked and the site knows you are there.
• Dock levelers and plates. A dock leveler is a hinged plate that bridges the trailer bed. Servicing one is stored-energy work: the leveler can drop or rise under spring or hydraulic force. Before reaching under a leveler, it must be held up with its maintenance strut and its power locked out and tagged under 29 CFR 1910.147, the mechanical lockout standard, or the work does not happen.

High bays and getting up there

Lights, unit heaters, exhaust fans, sprinkler lines and roof drains sit 20 to 30 feet up or more. An extension ladder at that height on a concrete floor in a working warehouse is the wrong tool. The usual answer is a mobile elevating work platform (MEWP): a scissor lift for straight-up access, a boom lift for reaching over racks.

• Who operates it. Operators should be trained and familiarized on the specific machine, under the ANSI A92 standards most rental yards and sites require. Many warehouses require proof of training before you bring one in.
• Fall protection. On a scissor lift, the guardrails are the fall protection; stay inside them and do not climb on them. On a boom lift, wear a harness with a lanyard attached to the platform's anchor point.
• Capacity. The platform's rated capacity covers people, tools and parts together. Check the weight of whatever you are lifting, from its manual, against what is left.
• Overhead. At height you are near sprinkler piping, electrical, and the roof structure. Do not hang from, strap to or rest anything on sprinkler pipe.
• The floor. Check the travel path for drains, dock plates, cords and debris before you drive.

Site rules: check-in, vests and escorts

Nearly every warehouse has these rules, even if they are not posted:

• Check in at the shipping office or front office, and say where you will be working.
• High-visibility vest. Many warehouses require one on the floor; carry your own, meeting ANSI/ISEA 107.
• A site contact. Someone who knows where you are and can stop forklift traffic.
• Cell phone use. Some sites ban phone use while walking on the floor.
• Hours. Many small warehouses run one shift. After-hours work usually needs a site contact on premises.

Worked example: a unit heater over aisle 2

A warehouse running one shift, 6:00 a.m. to 2:30 p.m., with two forklifts, calls in December: the gas-fired unit heater over aisle 2 has failed. The heater hangs from the roof structure at 24 feet, over the aisle between racks C and D. The tech estimates 4 hours to replace it, including gas shutoff, venting connection, wiring and startup.

Access. The heater is over the aisle, so the lift has to be in the aisle. A scissor lift with a platform reaching 26 feet is rented. The tech checks the new heater's weight from its manual against the lift's rated platform capacity, with two people and their tools, and it fits with margin. The old heater comes down on the same lift, one unit at a time.

When. The warehouse manager has two options:

• During the shift. Aisle 2 closes for 4 hours, and picks from racks C and D wait or come from overflow stock. The manager estimates that aisle handles about a third of the day's picks, which would push about 3 hours of picking into the end of the shift.
• After the shift. Work 2:45 to 6:45 p.m. with no forklift traffic. The manager or a supervisor has to stay on site until 7:00.

The manager picks after the shift, preferring to keep one supervisor about 4.5 hours past the 2:30 end of shift over pushing about 3 hours of picking late into the day.

On site, 2:45 p.m. The tech checks in, puts on a vest, and walks the route with the supervisor. Both forklifts are parked and keys pulled. The supervisor puts cones and a sign at both ends of aisle 2 anyway, because a forklift moved by someone who did not hear the plan is the risk. The tech checks the floor in aisle 2 for debris and drives the lift in.

The work. The tech shuts off the heater's gas at its appliance valve and the electrical disconnect, and locks and tags the disconnect. The tech proves the circuit dead with a tester before touching wiring. The gas connection is licensed work where your state or locality licenses gas work and the tech holds that license. The new heater goes up on the lift, hangs from the same structural points the old one used, and is connected. Return to service is its own step: the tech opens the appliance gas valve and leak-checks every joint with soap solution, then removes the lock, closes the disconnect and confirms power at the heater's control board before starting it. After startup, the tech confirms burner operation, checks the vent connection and draft, and checks for carbon monoxide at the heater with a combustion analyzer before leaving it running.

The racks. While at height, the tech sees an upright on rack D with a dent about 6 feet up, and tells the supervisor before coming down. The supervisor tags the rack and will have it inspected before loading the upper beams again.

Close, 6:40 p.m. The lift is out of the aisle, cones are removed, and the supervisor walks the aisle. The job notes record the heater replacement, the lift used, that aisle 2 was coned and forklifts were parked, and the rack D damage reported to the supervisor.

What would have changed it. If the warehouse ran two shifts, the after-hours option would not exist, and the aisle closure would have to be negotiated into the shift. If the heater had been over racking rather than an aisle, a boom lift reaching over the rack would be needed, with the rack loads below kept clear of the work zone.

How to verify you have it right

Before you leave: the lift is out of the forklift path, nothing of yours is attached to or leaning on racking, every lockout you placed is removed after the equipment is proved working and everyone is clear, any rack damage you saw has been reported, and the site contact knows the aisle is open again.

References

• 29 CFR 1910.178, powered industrial trucks
• 29 CFR 1910.147, control of hazardous energy (lockout/tagout), for mechanical and stored-energy work such as dock levelers; electrical work follows 29 CFR 1910.333
• ANSI MH16.1, specification for steel storage racks; ANSI A92 standards for mobile elevating work platforms
• NFPA 13, as adopted by your jurisdiction, for in-rack sprinklers and flue spaces
• See related: How Commercial Work Really Differs From Residential; What a Business Cannot Shut Down and for How Long