Specification Language for Municipal Sign Post Contracts

GENERAL SPECIFICATIONS FOR SIGN POSTS

​

Tubing shall be authentic TELESPAR® conforming to manufacturers’ standards. Tubing shall be corner welded by high-frequency resistance welding and externally scarfed to agree with corner radii to ensure telescoping action and breakaway function is congruent to Telespar's FHWA testing conditions. 

​

 

TELESPAR® MATERIALS

​

Galvanized finish, roll formed from 12 gauge (.105 U.S.S. Gauge) hot rolled steel, galvanized material ASTM A-653 Grade 50.

Average minimum yield strength after cold forming is 60,000 PSI.

 

 

TELESPAR® FINISHES ­

​

Pre-Galv Plus™ – Galvanized conforming to ASTM specification A-653 des. G-90. Corner weld is zinc coated after scarfing operation. Tubing then receives a conversion coating and a clear organic polymer topcoat.

 

​

DETAILED SPECIFICATIONS

​

Convexity and Concavity – Measured in the centre of the flat side, tolerance is ± .010 inch applied to the specific size determined at the corner.

​

Straightness Tolerance – Permissible variation in straightness is 1/16" in 3 feet.

 

Corner Radii – Standard corner radius is 5/32" ± 1/64".

 

Weld Flash – Weld flash on corner welded square tubing shall permit 9/64" radius gauge to be placed in the corner.

 

Telescoping – Using 12 gauge (.105) square tube, consecutive size tubes shall telescope freely for ten feet.

 

Length Tolerance – The length of each post shall have a permissible length tolerance of +/- 1/4”

 

Hole Tolerance – Tolerance on hole size is ± 1/64" on a 7/16" hole size. Tolerance on hole spacing ± 1/8" in 10 feet.