Cctv pole

The shaft for the pole may be round or octagonal and tapered. Circumferential welds, other than at the ends of the shafts, are not permitted. The exterior of longitudinal seam welds are ground or otherwise smoothed to the same appearance as other shaft surfaces. Longitudinal seam welds for pole sections have 60% minimum penetration and 5.9 in. of circumferential base welds. A maximum of 2 longitudinal seam welds may be made in pole sections. Use for all welds low hydrogen electrodes, or the equivalent in wire and flux for automatic welding. Use preheating for welding the pole to the base plate in accordance with ANSI/AWS D1.1 Structural Welding Code.

The material for pole shafts conform to the requirements in the standard drawings and comply with the requirements of ASTM A570 Grade 50, or A572 Grade 50, or A670 Grade 50, or A595 Grade A, or if

 designated A36M50 with the requirements of Item 442, “Metal for Structures”. Material supplied under the A570 Grade 50 or A595 Grade A specifications must meet their associated chemical and bend test requirements with the further stipulation that the materials must meet a minimum yield of 50 Kips/square inch and a minimum elongation of 18% in 8 in. or 23% in 2 in. prior to brake or tube forming operations.