The Tri-Side Safety Gate is a dual-gate mezzanine fall protection system engineered for pallet drop areas where platform depth is limited or where conveyors, walkways, or other obstructions are present alongside the drop zone. Its U-shaped rear gate design creates a completely enclosed workstation with no fixed side rails, allowing pallets to be accessed from the sides while maintaining continuous OSHA-compliant fall protection at the ledge throughout the entire loading and off-loading operation.
The Tri-Side mezzanine safety gate creates a controlled-access area while taking up a minimum amount of space on the work platform. Designed as a versatile platform safety gate, it supports safe material handling without restricting workflow efficiency. With fixed stanchions only fourteen inches (14″) deep, this mezzanine gate allows access to the sides of the pallet.
The Tri-Side Safety Gate meets OSHA, IBC, and ANSI standards for fall protection at elevated platform openings.
When to Specify the Tri-Side Gate
The Tri-Side is the correct gate specification for production platforms, walkways, or areas where depth is limited within manufacturing, material handling, and distribution center environments. Common applications include:
- Conveyor-integrated drop areas
- Walkway-adjacent drop areas
- Limited platform depth
- Doorway applications; standard or compact
- Side-access pallet picking
- Multi-level rack picking modules
The Tri-Side takes up only 14 inches of platform depth when the ledge gate is closed — significantly less than rolling or pivot gate systems. If your mezzanine depth is constrained, this is the gate to specify.
How the Tri-Side Works
The Tri-Side uses a high-use chain and sprocket drive system. When the U-shaped rear gate is lifted to allow access to the workstation, the ledge gate closes automatically, ensuring there is always a gate between the operator and the open ledge. When the ledge-side gate is lifted to move material, the rear gate closes.
Operation is ergonomic in the standard manual configuration. Power operation is also available for high-cycle or ergonomically sensitive applications.
Standard Models & Specifications
The Tri-Side Safety Gate is available in two standard configurations. Custom widths, depths, heights, and compact doorway configurations are engineered to order.
| Model | Drop Area Width | Drop Area Depth | Clearance Height | Overall Width | Overall Depth | Overall Height |
|---|---|---|---|---|---|---|
| Single Wide | 60″ | 60″ | 82″ | 64″ | 64″ | 125″ |
| Double Wide | 92″ | 60″ | 82″ | 104″ | 64″ | 125″ |
Custom sizes and configurations — including compact doorway models and rack supported configurations — can be engineered to meet your specific application requirements. Contact our sales team with your opening dimensions, platform depth constraints, and any obstruction details.
Features
- U-shaped rear gate design
- Only 14″ platform depth when closed
- High-use chain and sprocket drive system
- Kick plates on gates and sides
- No fixed side rails
- Manual or power operation
- Rack supported configuration
Materials & Finish
- Powder-coated mild steel — standard industrial finish for general warehouse, distribution, and manufacturing environments
- Electro-polished stainless steel — for food processing, pharmaceutical, cleanroom, and corrosive or frequent-rinse environments
Compliance
- OSHA 29 CFR 1910.23 — Walking-Working Surfaces; fall protection at mezzanine and elevated platform openings
- ANSI standards — applicable to guardrail and fall protection systems
- IBC (International Building Code) — as applicable to elevated platform guarding
What is the Tri-Side Safety Gate and when is it the right choice?
The Tri-Side Safety Gate is a dual-gate mezzanine fall protection system with a U-shaped rear gate that creates a completely enclosed workstation without fixed side rails. It is the correct specification when a pallet drop area is adjacent to conveyors, walkways, or other obstructions — or when platform depth is too limited for a standard rolling or pivot gate. It is also used in doorway applications and multi-level rack picking modules. The gate takes up only 14 inches of platform depth when the ledge gate is closed.
Can the Tri-Side Safety Gate work in a doorway or platform extension application?
Yes. The Tri-Side is available in a compact model specifically designed to extend through a doorway or into a mezzanine area, providing compliant fall protection at elevated doorway openings where a standard gate configuration would not fit. Contact our sales team with the doorway dimensions and platform configuration for a compact Tri-Side quote.
How does the Tri-Side maintain fall protection without fixed side rails?
The Tri-Side’s U-shaped rear gate wraps around the sides of the workstation, providing protection on three sides without permanent side rail structure. When the rear gate is in the closed position, the workstation is fully enclosed on the rear and sides. When the rear gate is lifted, the ledge gate automatically closes — maintaining a barrier between the worker and the open edge. At no point is the worker unprotected on the ledge side of the gate.
Is a rack supported Tri-Side gate available?
Yes. The Tri-Side Safety Gate is available in a rack supported configuration that integrates with pallet rack components from any manufacturer, making it suitable for multi-level pick module applications where the Tri-Side’s limited-depth profile and side-access design are required at the rack bay level.
What is the minimum platform depth required for a Tri-Side gate?
When the ledge gate is closed, the Tri-Side requires only 14 inches of platform depth. This makes it the most space-efficient gate option in the Mezzanine Safeti-Gates product line and the correct choice when mezzanine platform depth is a binding constraint. Contact our sales team with your exact platform depth and opening dimensions to confirm fit for your specific application.
Ready to specify the Tri-Side Safety Gate for your facility?
Contact our sales team with your platform depth, opening dimensions, any adjacent conveyor or walkway details, and equipment type. We’ll confirm the right configuration — standard, compact doorway, or rack supported — and provide a complete quote package.
Call: (978) 768-3000 | Email: Sales@MezzGate.com
