LIR Fiberglass Mast

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The Fiberglass Frangible Approach Mast was developed by the Federal Aviation Administration as a Low Impact Resistant (L.I.R.) support structure for high intensity (ALSF2) approach systems from 6 ft. to 128 ft. The essential function is to provide frangible support for equipment installed in the clear zone. In 1979 Jaquith Industries received a government contract as the lead manufacturer to develop the LIR Fiberglass Frangible Mast. Since then, Jaquith has expanded the role of the LIR Mast to include a variety of other applications.

LIR is defined as a break-away mast for use in structures that support airport approach lighting & support systems. The LIR design will withstand 100 mph winds without ice and 75 mph winds with a 1/2 inch radial ice load. Yet, should an aircraft slip below the glide slope and impact a support structure, the structure breaks into pieces without catastrophic damage to the wing support.

Masts Are Available In Any Height From 6' to over 40'

6ft to 21.1ft

21.2ft to 40ft

Heights Exceeding 40ft

Masts Are Easily Lowered For Maintenance & Repair

The Portable Tilt Device can be easily transported to each location

Mast as tall as 40' can then be lowered for service with as little as one person

Ground level access to mast & fixture allows for easy maintenance & repair

Mast Are Durable, Yet Collapse When Struck

Weather, Temp, UV, & Corrosion Resistant

Rated for 100 mph or
75 mph with 1/2" ice

Multiple Break Points
Ensure Frangibility

Jaquith's Low Impact Resistant Fiberglass Frangible Mast supports a wide variety of equipment from approach lighting, to weather, radar systems, and more. The LIR Mast is able to rigidly withstand winds of 100 mph, while maintaining frangibility should an aircraft strike the mast. The masts lightweight fiberglass construction is extremely resistant to UV, temperature, weather, and corrosion, while requiring little to no maintenance throughout its life cycle. Should maintenance be required, the mast can be lowered to ground level with as little as one person.

Technical Info:

Ordering

Installation

LIR Mast Installation Guide

LIR Mast Drawings

Ms-20 Mast Drawings

Foundation Drawings

Info & Certs

FAA Advisory Circular Engineering Brief 79

US Air force Frangibility Guidelines

Buy America Program

JI Buy America Waiver

View More Online Resources

Ordering Guide:

1) Select Mast Type

Masts for ground application are available from 6ft (1.83m) to 40ft (12.19m)

2) Select Mast Height

Specify height to the nearest inch from the top of the foundation to the centerline of the luminaire

3) Select Interface

Select manufacturer and size of luminaire or top cap interface - All FAA & Calvert Light configurations available

LIR Accessories

VEGA Low Impact Resistant Fiberglass Mast Accessories

Jaquith Industries is continually working with industry partners to develop new airfield technologies. If you cannot find what you're looking for, the Engineering Team at Jaquith Industries stands ready to develop an appropriate accessory to fit your needs!