Abridgment of a new transmission line construction: Post type towers

The new construction described is intended to secure a sturdy and simple tower, not sensitive to irregularities in footing conditions; it is generally applicable where a horizontal arrangement of conductors is feasible. The tower consists of an articulated overhead transverse bridge carrying the conductors and hinged at the tops of the footings. Two or three intermediate towers are used between stabilizer towers. Transverse strength is secured by crossed internal ties and longitudinal stresses are taken up in the stabilizer towers by heavy guys and in the intermediate towers by the ground wires and conductors which transmit these stresses to the stabilizer towers. The wide base structure thus secured has substantially no resultant uplift on the footings, offering a very large saving in foundation costs. This saving, together with the lessening of material and erecting costs, and the great ease with which it is adapted to varying ground conditions, makes this a very economical type of tower.