Loading Dock Shelter Product

Overview

A loading dock is a planned hole in the building envelope, and an open dock with a trailer parked at it still leaks air around all four sides of the trailer — a gap of 10–30 cm top and sides that behaves like an always-open window. A dock shelter closes that gap from outside: a rigid Shelter Frame projects about 600 mm from the wall around the door, and fabric curtains hang into the opening so that when the trailer backs in, its roof and sides press into the curtains and the building effectively extends to wrap the truck. Refrigerated warehouses, food plants, and any conditioned facility use shelters (or their cousins, compression dock seals) to control energy loss, rain, and pests at every door.

The shelter's defining trade against the foam dock seal is access. A seal's foam pads compress against the trailer's rear face and intrude into the opening, shading the outer 250 mm of the doorway on each side; a shelter's curtains touch only the trailer's top and sides, leaving the full width and height clear for forklifts and end-loading of wide pallets. Shelters also serve a wider range of trailer sizes from one unit, which is why high-mix fleets favor them.

How it seals

The trailer reverses between the Wheel Guides, which funnel the tires to center, with the Guide Stripe on each curtain giving the driver a mirror target. As the trailer enters, the Side Curtain wipe along its sides and the Head Curtain drapes onto its roof. Inside each curtain, sewn-in Fiberglass Stays — pultruded ribs that bend like archery bows — press the Curtain Fabric against the trailer skin and spring back straight after every departure; this stay action, repeated tens of times a day, is the mechanism that makes a fabric panel behave like a seal. The Weighted Hem keeps the head curtain flat on the trailer roof in wind, and the curtains' contact corners carry Wear Pleats, sacrificial plies that take the scrubbing and are restitched or replaced as routine maintenance.

Trailer impact never reaches the fabric system's mounting. The trailer stops on the Dock Bumpers: stacks of laminated tire-tread rubber about 110 mm thick clamped in welded Bumper Angle frames, absorbing the arrival of a 30-tonne trailer at walking speed and setting the standoff distance the whole shelter geometry is designed around. The frame itself is built to forgive: wood or steel Frame Members on Backer Boards flex or sacrifice themselves if a trailer arrives high or off-center, and Translucent Panels in the header daylight the trailer interior so loaders are not working in their own shadow.

Closing the last leaks

With the trailer seated, the remaining paths are corners and door hinges. Trailer rear doors swing 270 degrees and lie against the trailer sides, leaving a vertical gap at each hinge line; the Corner Pockets seal around them. The triangle at each bottom corner — bounded by bumper, leveler pit, and trailer underside — is closed by foam Draft Pads, and the Rain Guard on the header diverts wall runoff outboard so it sheets off the trailer roof rather than into the opening. Done well, the dressed opening cuts infiltration around the trailer by roughly 90 % relative to a bare dock, which on a refrigerated dock pays for the shelter in energy alone within a few years.

Hybrid designs add the Foam Head Pad: instead of a draped head curtain, an open-cell Foam Core in an abrasion Pad Cover compresses against the trailer top, borrowing the seal's tighter header while keeping shelter-style side curtains. These suit docks with consistent trailer heights, since foam needs compression to work.

Selection and wear

The shelter is sized to the door, the dock height (typically 1.2 m), the approach slope, and the trailer population; a declined approach drives the trailer top higher into the header and changes pad and curtain projection. Fabric weight is matched to traffic — 40 oz vinyl polyester for moderate doors, 60 oz or Hypalon where doors turn dozens of trailers daily. Wear is concentrated and intentional: pleats, hems, and bottom corners are consumable, the frame and bumpers last on the order of a decade, and inspection is a visual walk-around. The Dock Light Bracket carries the dock light and communication signals that coordinate with the leveler and vehicle restraint completing the dock position.