IEEE 1070-2006 pdf download IEEE Guide for the Design and Testing of Transmission Modular Restoration Structure Components
Any steel used in fabrication of the gimbal joints should conform to specifications given inASTM A36/A36MAfter fabrication, all steel should be hot dip galvanized in accordance withASTM A123/A123M
All bolts should be made from AISI C1040 steel. The shape of the bolts and nuts should conform to thespecifications of a 5/8-UNC regular semi finished hexagon bolt and nut. All bolts should be 88.9 mm longand have a minimum thread length of 63.5 mm Bolts and nuts should be electroplated zinc coated inaccordance with ASTM B633. lf the components are to be kept in service longer than three years.appropriate aluminum bolts should be used
Stainless steel washers, type 304 or equivalent, should be permanently affixed to the 2.134 m, 4.267 m, and6.4 m tower sections’connection holes (16 places per tower section); see Figure 1 (A and B).
3.2 Design considerations
The 6l0 mm x 610 mm lattice column was designed with aluminum diagonal angles to a compressive loadof 334 kN at a column height of 25.6 . The basic column section is 6.4 with other column heights of4.27 m and 2.13 m. These combinations allow considerable flexibility in building structures for moststandard transmission voltages. These three lengths maintain the same diagonal spacing for ease ofclimbing. The entire column assembly is welded for consistency, strength and to eliminate the loss ofbolted members.
The column end plates have guide pins and mating holes for ease in assembly. The assembly hole patternon the end plates has the same spacing throughout, and it meshes with all other components. A 4 in channelis placed next to the end plates to create a stacking slot. A hole is centered in the column end plates and canbe used for a load line through the center section of the columns.
The foundation base has the same assembly hole pattern as the columns. Handholds (lifting rings) areprovided, and large holes conveniently spaced are for stabilizing bars, which can be driven into the groundor bolted to a crib of crossarms or cross ties.
The guy plates fit between the column sections to serve as guy wire and insulator attachment points. Theassembly bolts are long enough to connect two column end plates and three guy plates, as requiredThe three holes in the guy plates are to accommodate spread or straight guys. If a temporary guy isnecessary, the permanent guys can be installed without affecting the temporary guy.
The box section is available to support horizontal post insulators, provide vertical spacing for bundleconductors and attachment points high strength guy plates, if required. The box section has the sameassembly hole pattern and can be used between column sections and guy plates or above the foundation tohelp level a structure. The gimbal is 2.13 m high and meshes with the foundation and column end platesAccording to its intended use, the gimbal can remain a pivot, or it can be connected in a rigid manner withstays.
Combinations of these parts can make a variety of structures, as shown in Goodreid and Magwood (B6.
Grose[B7],and Van Name,et al.[B13].
IEEE 1070-2006 pdf download
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