PVC Strip Door for Forklifts: What Thickness Do You Need?

If you've ever watched a standard PVC strip curtain last three months before it's shredded beyond recognition in a busy forklift environment, you'll understand why specification matters. A PVC strip door designed for pedestrian use will not survive regular contact with forklift tynes, masts, and loads — and specifying the right product from the outset is the difference between a barrier that lasts years and one that needs replacing every quarter.

This guide covers everything you need to know about selecting the correct PVC strip curtain thickness, width, and hardware for forklift and heavy vehicle access applications.

Why Standard Strips Fail in Forklift Environments

Standard pedestrian-grade PVC strip curtains are typically 2mm thick and 100–200mm wide. They're designed to flex easily under light contact and are perfectly adequate for foot traffic and hand pallet trucks. Put a counterbalance forklift through them and the picture changes dramatically.

The Problem with Light Strips in Heavy Traffic

• Tearing and splitting: 2mm strips are easily torn by forklift tynes, cage sides, or sharp corners on loads. A single pass with a poorly loaded pallet can shred multiple strips simultaneously.
• Distortion and bunching: Lighter strips get pushed sideways by forklifts and bundle up to one side rather than parting cleanly. They then hang at an angle, losing their barrier effectiveness and becoming a snagging hazard.
• Suspension rail damage: If strips tangle or bunch, the force is transmitted to the suspension rail mountings. Undersized rails can be pulled off walls or bent by repeated forklift contact.
• Safety risks: Damaged, bunched, or hanging strips reduce visibility through the doorway — a significant safety concern in mixed pedestrian and forklift environments.

The solution is not simply to buy heavier strips and hope for the best. Proper specification involves getting the right combination of strip width, thickness, overlap, and suspension hardware working together.

Strip Width: 300mm vs 400mm

For forklift access, the standard recommendation is 300mm or 400mm strip widths — significantly wider than the 100–200mm strips used for pedestrian traffic.

300mm Wide Strips

The most popular choice for general forklift and vehicle access. 300mm strips provide:

• Good coverage with fewer individual strips across the opening
• Easier parting for forklift passage — the strip pushes aside rather than multiple narrow strips tangling together
• Good balance between seal effectiveness and ease of passage
• Suitable for openings up to approximately 3m wide

400mm Wide Strips

For large loading bay openings and heavy vehicle access — articulated lorry doors, large counterbalance forklifts with wide loads, reach truck environments. 400mm strips offer:

• Maximum coverage with minimum strip count, reducing potential tangling points
• Excellent performance in very high-traffic environments where strips need to part and return quickly
• More robust individual strip — the wider cross-section distributes impact forces over a larger area
• Ideal for openings of 2.5m width and above

Browse our full range of forklift and vehicle access PVC strip curtains to see available options for 300mm and 400mm strip widths.

Thickness: 3mm vs 4mm

This is often the most debated specification choice for forklift applications. Here's a practical breakdown:

3mm Thickness

• Suitable for regular forklift traffic where loads are generally well-contained and the forklift passes through at controlled speeds
• More flexible than 4mm — parts more easily and returns to position more readily after contact
• Lighter weight per strip makes handling and installation easier
• The right choice for the majority of warehouse and distribution environments

4mm Thickness

• Recommended for high-impact environments — fast-moving forklifts, large counterbalance trucks, heavy or awkward loads that make regular hard contact with the curtain
• Significantly more resistant to tearing and splitting under impact
• Stiffer material provides better barrier effectiveness in draught and temperature control applications
• Higher weight per strip — suspension rail must be rated for the increased load
• Best suited to environments where the forklift regularly impacts the curtain rather than cleanly parting it

Which Should You Choose?

The simplest rule of thumb: if your forklifts frequently carry loads that protrude sideways or if operators travel at speed through the curtain, go for 4mm. For controlled forklift operations with well-managed loads and reasonable speeds, 3mm provides an excellent balance of durability and flexibility.

If in doubt, 3mm with 300mm width is the most common specification for general warehouse forklift access and will perform well in the vast majority of applications.

Overlap Ratios for High-Traffic Environments

Overlap — how much each strip covers the adjacent strip — is a critical variable that's often overlooked in high-traffic forklift environments.

Standard One-Third Overlap

The standard overlap of approximately one-third of the strip width (e.g., 100mm overlap on 300mm strips) provides a good thermal and draught barrier whilst allowing strips to part easily under forklift contact. This is the recommended starting point for most forklift applications.

High-Traffic Adjustment

In very high-traffic environments — where forklifts pass through 50+ times per hour — consider reducing the overlap slightly to ease passage and reduce the twisting force on strips as forklifts push through. A lighter overlap means strips part with less resistance, returning to position more cleanly and reducing the cumulative stress on each strip and on the suspension fixings.

Temperature-Controlled Environments

Where forklift access opens into a cold room or temperature-controlled zone, the competing demands of thermal barrier performance (more overlap) and easy forklift passage (less overlap) must be balanced. In these applications, 50% overlap is often used with a double-door arrangement — two curtains mounted close together — so each curtain has lighter overlap but the combined seal is effective.

Suspension Hardware for Heavy-Duty Applications

A PVC strip door is only as reliable as the hardware it hangs from. In forklift environments, the suspension rail and fixings are under constant stress — vibration from passing vehicles, the weight of heavy strips, and occasional direct impact from loads or forklift masts.

Rail Specification

• Standard rails: Adequate for light traffic and narrow openings. Not recommended for regular forklift contact.
• Heavy-duty rails: Constructed from thicker-gauge steel with reinforced fixing points. The correct choice for any forklift application.
• Stainless steel rails: For cold room, food facility, or outdoor environments where corrosion resistance is required.

Fixing Requirements

In forklift environments, use the maximum number of fixing points specified for the rail — not the minimum. For openings wider than 2m, add intermediate fixing brackets to prevent rail deflection under load. Use appropriate anchor fixings for your wall material — expanding anchors for masonry, coach screws for timber frames.

Crash Protection

In very active forklift environments, consider fitting a crash bar or protective frame around the suspension rail. This prevents forklift masts — which can reach 3m+ when elevated — from striking and damaging the rail hardware during reversing or manoeuvring near the doorway.

Pedestrian and Forklift Shared Zones: Safety Considerations

Many warehouse doorways serve both pedestrian and forklift traffic — which creates a genuine safety challenge. The strip curtain contributes to safety in several ways, but must be installed correctly to be effective.

Visibility

Clear PVC strips allow pedestrians and forklift operators to see movement on the other side of the curtain before entering the doorway. This is a significant safety advantage over solid doors. Maintain clarity by keeping strips clean and replacing any yellowed or scratched strips that reduce visibility.

High-Visibility Strips

In shared pedestrian and forklift zones, consider fitting yellow or orange PVC strips (or strips with reflective yellow banding) at the edges of the curtain to mark the boundary of the vehicle route and the pedestrian safe zone. This provides a visual cue to both pedestrians and forklift operators.

Traffic Management

A strip curtain alone cannot separate pedestrian and forklift traffic. Combine your PVC strip door installation with clearly marked pedestrian walkways, floor markings, and — where possible — separate pedestrian access routes to doorways used by forklift traffic.

Strip Return Speed

Heavy strips return to position more slowly than lighter ones — this means there's a brief window after a forklift has passed through where strips are still settling back into place. Pedestrians should be trained to wait until the strips have settled before approaching or passing through in busy forklift environments.

Recommended Specification Summary

Application	Strip Width	Thickness	Overlap	Rail
General warehouse forklift	300mm	3mm	1/3	Heavy duty
High-impact / fast traffic	300–400mm	4mm	1/3	Heavy duty reinforced
Large loading bay / HGV	400mm	4mm	1/3	Heavy duty reinforced
Cold room forklift access	300mm	3mm polar grade	50%	Stainless / heavy duty

Shop Forklift-Grade PVC Strip Doors

Our forklift and vehicle access PVC strip curtains are specifically designed for demanding industrial environments. Each product is clearly specified by strip width, thickness, and application type — so you can order with confidence.

We supply complete kits including heavy-duty suspension rails, PVC strips in your required specification, and all fixings — ready to install.

Also useful:

• Cold Room & Freezer Strip Curtains — polar-grade for low-temperature forklift access
• Clear PVC Strip Curtains — for pedestrian zones and mixed traffic

Shop Now — PVC Strip Doors for Forklifts UK →