Boundary & Survey Markers by Glasforms

Low-cost Post for Marking Trails, Boundaries or Property


Glasforms’ fiberglass boundary/survey markers are the ideal and economical solution to mark hiking trails, boundaries, or surveyed property. Installing is fast and easy in most soils and usually takes less than a minute. They are extremely weather resistant and able to maintain their flexibility and withstand temperatures as low as -80 to as high as 160 degrees Fahrenheit. Our double rib design provides extra support and easy installation of bolted signs. The Boundary/Survey markers are available in a variety of colors and lengths with or without pre-applied standard or custom decals.



This specification covers the minimum material, mechanical and performance requirements of Glasforms continuous glass fiber reinforced BOUNDARY MARKER. This product may be used to provide daytime and nighttime delineation for survey/boundary lines, utilities or other marking applications requiring assured long-term outdoor durability, vandal resistance, and vehicle impact resistance. 


General Requirements

DESIGN & Material: 
The BOUNDARY MARKER shall be a single piece marker capable of simple, permanent installation by one person using a manual driving tool.  The BOUNDARY MARKER upon proper installation shall resist displacement from wind and vehicle impact forces. The BOUNDARY MARKER shall be of a constant cross sectional design with two reinforcing support ribs incorporated longitudinally along the back of the marker providing structural rigidity. The bottom end of the marker shall be pointed for ease of ground penetration. The BOUNDARY MARKER shall be constructed of a durable, UV resistant, continuous glass fiber and marble reinforced, thermosetting composite material which is resistant to impact, ozone, and hydrocarbons within a service temperature range of -80°F to +160°F.


Physical and Mechanical Requirements

DIMENSIONS:The BOUNDARY MARKER shall conform to the shape and overall dimensions shown in the approved drawing. The nominal BOUNDARY MARKER width shall be 2.50 inches in order to accommodate a 2.375” decal and provide adequate daytime visibility. The BOUNDARY MARKER shall be of such length to provide the required height above the road surface with a minimum embedment depth of 18 inches. 


The BOUNDARY MARKER shall have the minimum mechanical properties as follows: 

Property ASTM Test Method Minimum Value
Ultimate Tensile Strenghts D-638/D-3916 75,000 psi
Ultimate Compressive Strenght D-695 50,000 psi
Specific Gravity D-792 1.8
Weight & Glass Reinforcement D-2584


Barcol Hardness D-2583 50
Flexural Strenght D-4476/D-790 60,000 psi
Flexural Modulus D-4476/D-790 3,300,00 psi



The BOUNDARY MARKER shall be pigmented throughout the entire cross-section so as to produce a uniform color, which is an integral part of the material.  Ultraviolet resistant materials shall be incorporated in the construction to inhibit fading or cracking. 


Temperature Resistance

Cold Impact Resistance:
The BOUNDARY MARKER shall be conditioned a minimum of two hours at -40°F ± 3°F.  A minimum two-pound spherical weight shall be dropped a distance of five feet through a virtually frictionless vertical guide to impact the surface of the marker at mid section. The surface of the post being struck by the steel ball shall be in a horizontal position with the post supported and held in position at both ends. The post shall be subjected to five impact tests concentrated near the middle of the post within 10 minutes from the removal from the environmental chamber. Excessive fracturing, cracking, or splitting of the posts shall constitute failure.    

Another marker shall be struck flush against a flat solid surface three times within two minutes after removal from the conditioning chamber. To strike the marker it should be manually swung through a 90° arc, and the marker shall not fracture or shatter upon impact.



The Glasforms BOUNDARY MARKER shall be capable of selferecting and remain functional after being subjected to an impacts by a typical passenger sedan at 35 m.p.h. The BOUNDARY MARKER shall retain a minimum of 60% of its sheeting.