| 摘要 |
1. A structure (12) made of web members for trusses (11), said web members (20) being produced in a single piece and firmly attached to each other at their extremities, where said firmly attached extremities of each pair of consecutive and adjacent web members (20) converge in a peak area (21, 21') of said structure (12), and the opposite extremities of said pairs of consecutive and adjacent web members are distanced from each other, so as to form a continuous structure suitable for being associated with some braces (13) of said truss (11), said web members (20) being constituted by cross ties, said peak areas (21) being firmly attached to cleats (22) produced in a single piece with said extremities of said cross ties (20), so as to facilitate connecting said structure (12) to said braces (13), said cleats (22) being constituted by appendices bent to an "L" shape and suitable for being associated to said braces (13) of said trusses (11), said consecutive and adjacent cross ties (20) being symmetrical, in pairs, with respect to the axes of symmetry (33) set at right angles to an axis of gravity (26) of said braces (13), when said structure (12) is mounted on said braces (13) in order to produce said truss (11), characterized in that said braces (13) are formed by a central shaped portion (14) having sides (15) of a essentially identical size, projecting appendices (16) also having essentially identical sides (17), an "L" shape and essentially half the size of said sides (15) of said central shaped section (14), where the peaks (18) of said appendices (16) having an "L" shape are facing each other, said cleats (22) having a first flap (35') and a second bent flap (35''), wherein each of said first flap (35') is associated with said appendices (16) and each of said second bent flap (35'') is associated with the internal side (15) of said braces (13). 2. A structure (12) according to claim 1, characterized in that said web cross ties (20) have axes of gravity (25) essentially crossing each other at the center of gravity (26) of said braces (13). 3. A structure (12) according to claim 1, characterized in that said braces (13) are present in a number of four. 4. A structure (12) according to claim 1, characterized in that it mutually connects at least two pairs of said braces (13) of said truss (11). 5. A structure (12) according to claim 1, characterized in that it is firmly attached to at least another of said structures (12), in order to produce composite structures suitable for connecting some braces (13) to each other, whose size exceeds that of a single structure (12). 6. A structure (12) according to claim 1, characterized in that it lacks any triangular portions (28'') that constitute its bent flaps (35"). 7. A structure (12) according to claim 4, characterized in that some second peaks (21') set on an ideal side of said structure (12) differ from said peaks (21) set at an opposite ideal side of the same, because they lack a triangular flap (35") of said appendix which constitutes said cleat (22). 8. A truss (11) comprising four braces (13), where said braces (13) are connected to each other, at least in pairs, to structures made of web members (12), wherein said structures (12) made of web members converge to a same area of said braces (13) and therefore are connected to each other in crossing areas (19), characterized in that a first structure made of web members (12) has peaks (21)9 firmly attached to one of said brace; (13) where its first bent flaps (35'') are associated with the sides (15) of a portion (14) of said braces (13) and its cross ties (20) are simultaneously associated with the sides (17) of some appendices (16) of said braces (13), and where moreover the gross ties (20) of a second structure (12) converge on the same brace (13) while presenting second bent flaps (35') connected to a portion of said first structure (12) comprised between two adjacent cross ties (20) and said second flaps (35'). |
