Barrier Gates: The Complete Guide to Automatic Vehicle Access Barriers

Introduction

Automatic barrier gates, also called boom gates or parking barriers, control vehicle entry and exit at parking facilities, commercial properties, industrial sites, residential communities, company grounds, toll facilities and other controlled entrances. A typical system combines a powered cabinet and drive, a boom arm, access control, vehicle detection and safety equipment.

Barrier Gates by Size and Application

Barrier gates range from compact, high-speed parking systems to wide and extra-wide barriers. Common Security Entrances configurations include approximately 10–12 ft parking barriers, 20 ft wide barriers, 28 ft extra-wide barriers, 33 ft ultra-wide barriers and high-security configurations around 10–15 ft. The arm should be selected for the actual clear opening, vehicle type and traffic requirements.

Barrier Types

Straight arms are used where adequate overhead clearance is available. Articulated arms are used where clearance is limited; 90° configurations fold upward and 180° configurations fold back toward the operator. These configurations are useful in garages, canopies and other low-clearance locations, so verify the required vertical and rear clearances for the selected arm. High-security versions may add security skirts to reduce pedestrian bypass, while toll barriers are specialized for rapid, high-cycle operation.

Barrier Gate Components

The cabinet houses the drive and control equipment. Access readers and keypads authorize vehicles, while loops, photo eyes, safety edges and other sensors provide vehicle detection and protection.

Figure 1 — Typical barrier-gate components and safety devices.

Concrete Pads, Foundations and Conduit

Automatic barrier cabinets should be mounted to a level, structurally sound foundation or approved structural mounting system. Foundation size, anchor locations and depth are product-specific.

Before concrete is poured, coordinate stub-ups for power, control/data wiring and vehicle-detection loops where required. Keep power and low-voltage/control paths separated when the installation instructions require separate conduits. Protect conduit openings during the pour and leave sufficient length for final cabinet connections.

As a product-specific example, published Magnetic access/parking installation information uses a 450 × 600 mm (17.7 × 23.6 in) foundation section with a minimum frost-protected depth of 800 mm (31.5 in), plus separate 29 mm (1.14 in) conduits for mains, control lines and induction-loop connections where used. These are not universal barrier-gate dimensions.

Figure 2 — Conceptual concrete pad, anchor and conduit planning diagram.

Typical System Layout

A complete lane may include an access reader or keypad, barrier cabinet and boom, vehicle-loop detection and safety photo eyes or light barriers. The system should be laid out so access authorization, vehicle detection and safety functions work together.

Barrier Arm Sizes and Replacement

Barrier arms are available in multiple lengths and profiles. Security Entrances commonly works with 10, 12, 15, 20, 28 and 33 ft classes, plus compatible custom replacement lengths. We offer replacement arms for FAAC, Magnetic, HySecurity, All-O-Matic, LiftMaster and DoorKing. Replacement arms are not universal and must match the existing operator, mounting interface, profile and configuration.

High-Security Barrier Gates

High-security barrier gates may add security skirts to reduce pedestrian bypass beneath the boom. Taller configurations can provide additional climb-over protection, but compatibility depends on the selected arm and barrier. High-security access control should not automatically be described as crash-rated vehicle mitigation.