Static structures (e.g. – buildings) – Openwork; e.g. – truss – trellis – grille – screen – frame – or... – Three-dimensional space-defining
Patent
1990-07-12
1992-01-14
Murtagh, John E.
Static structures (e.g., buildings)
Openwork; e.g., truss, trellis, grille, screen, frame, or...
Three-dimensional space-defining
52694, 174 45R, E04C 306, E04H 1208
Patent
active
050798910
ABSTRACT:
A bidimensional support or tower for overhead electric energy transmission lines is formed of a flat truss structure, the stringers of which consist of at least one truss beam comprising a pair of cold-bent channel sections connected together, with their cavities facing, by means of a zigzag-bent steel rod applied by welding to the flanges of said sections. Said tower comprises two stringers connected by one or more horizontal girders, which stringers can be vertical and parallel, or else converging towards the top substantially in correspondence of the point where the loads are applied, in which latter case a vertical structural element is provided above said point. Said stringers and said vertical structural element are formed of said truss beams, positioned either singly or side-by-side.
REFERENCES:
patent: 1762112 (1930-06-01), White
patent: 1880000 (1932-09-01), Wallen
patent: 2284898 (1992-06-01), Hartman
patent: 2315687 (1943-04-01), Burke
patent: 2996160 (1961-08-01), Voight
patent: 4646505 (1987-03-01), Paris
"Colorado-UTE's 345 kV Steel Latticed H Frame Line Designed as a Structural System", IEEE Transactions on Power Apparatus and Systems, vol. 101, No. 10, Oct. 1982, by H. Sansom et al., pp. 4069-4078.
Murtagh John E.
SAE Sadelmi S.p.A.
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