摘要:
In a steel truss an upper longitudinal beam (12) and a lower longitudinal beam (13) are interconnected at their respective ends by vertical posts (14; 15) and intermediate their ends by a plurality of obliquely extending struts (16; 17) and ties (18; 19), of which each strut and an associated tie intersect substantially midway between the two beams. Each end post (14; 15) is composed of two parts 14', 14"; 15', 15") of substantially equal lengths, which are interconnectable end to end, and each strut (16; 17) and tie (18, 19) is likewise composed of two parts (16', 16"; 17', 17"; 18', 18"; 19', 19"). These parts of each strut and its associated tie are united in a special, common joint including connection plates welded to the strut parts (16', 16"; 17', 17") and having flat end portions of the tie parts (18', 18"; 19', 19") interposed between them.
摘要:
Trussed girder, roof framing using the trussed girder and method of constructing the roof framing of a building using the trussed girder. In the trussed girder, an upper cord and a lower cord are jointed through lattice members. The trussed girder includes: a prestressing steel member; and an attaching mechanism for attaching the prestressing steel member to at least one of both the upper and lower cords to longitudinally extend under tension for providing prestress to the trussed girder.
摘要:
A method is provided of erecting an arch-like structure comprising means (12), base plates (14), connectors (16) and purlins (18) or cross bracings. The method involves attaching a first beam (12a) to the base plate (14) by means of a first bolt (20) only with the beam (12a) lying on the ground. The end of the first beams (12a) is lifted sufficiently to allow the connection thereto of the second beam (12b) and this process is repeated with subsequent beams (12c) through to the last beam (12d). The whole operation is carried out on the ground and the arch rises into the air. A connector is described as is a base connector. A beam including a box section on either side of a profiled web is described along with variations thereof and a light weight structure which can be converted to a trailable vehicle and which includes the principle of the invention is also described.
摘要:
The invention is a building arch for use in constructing a frame for a building. An arch comprises several rigid strut units (1,2,3,4) each having two spaced booms (OB, IB) in pin-jointed connection with one another. One boom (OB or IB) of each unit is pin jointed directly to one boom of a successive unit to form a chain, and the other boom (IB or OB) of each same unit is connected to the other boom of the same successive unit by way of a link (7) pin jointed to the said other booms to form another chain. Arches of different contours may be formed using strut units of the same dimensions by varying the number of strut units employed and by employing links of different lengths.
摘要:
A structure is proposed for metal constructions, in particular of the trestlework type, with at least an angle iron having equal legs, eachone of which being extended at its free and with a first and a second extension length having a width substantially equal to half width of a leg, the first extension length being positioned at right angle relatively to the first extension length, the second extension length being positioned at right angle relatively to the first extension length, in such a direction as to depart from the other leg of the angle iron. The structure is moreover provided with jointing elements each constitued by a plate suitable to be fastened on to the angle iron at least on correspondence of the inner surface of one of its legs, and in correspondence of the inner surface of the second extension length of its second leg.
摘要:
A mast or beam construction including a plurality of similar components 22, each comprising a web with one side having a portion 24 defining a recess 25 of C-shaped extending uniformly lengthwise of the component and the opposite side having an enlargement 28 to fit into the recess 25, the mast being made up of interengaged components.
摘要:
The reticular structure comprises a plurality of substantially rectilinear axis beams (1) having at least one lower bar (2) and at least one upper bar (2') having different length. Each of these beams (1) is articulated to the adjacent beams at the ends of the bar (2) having larger length and the link between the bars (2') having smaller length is obtained for interposition of an intermediate element (9) having a length to be prearranged according to the outline of the structure to be realized.
摘要:
A modular unit 10 for constructing structural supports comprises an elongate member 12 and a link 14 extending laterally from the member. Castellations 28 are provided around a rim 26 at each end of the member so that the elongate members of similar units can be mated together. The link is made up of two struts 16 and 18 which are offset to one side of the elongate member and a flange 20 with bolt holes 22 is provided at the end of the link. Thus the links of two similar units can be bolted end to end to form a basic unit for use in constructing structural supports. Such a basic unit has two elongate members which are substantially parallel to each other and held apart and connected by the links. The invention also extends to an integral basic unit having such a configuration.