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Trusses

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Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001113
EISBN: 978-1-62708-214-3
... Abstract Six cracked A36 steel gusset plates that formed part of the roof trusses of a large manufacturing facility were discovered during a routine final inspection of a new building construction. Two different-size plates from different locations in the building were removed and tested...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001151
EISBN: 978-1-62708-219-8
... analysis consisted of an onsite inspection, macrofractographic examination of the fractures where the girders were welded to the columns, macrofractographic examination of the fractured trusses, metallographic examination of the girder and truss materials, chemical analysis of the low-carbon steel girder...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001588
EISBN: 978-1-62708-221-1
... Abstract On 23 Dec 1997, a portion of the main ore conveyor at a large mine collapsed onto a highway and shut down mine operations. The conveyor structure that collapsed was supported by a steel truss spanning 185 ft. Truss failure occurred just as the conveyor transport rate was increased...
Image
Published: 01 June 2019
Fig. 3 Fractured truss in roof section adjacent to one that collapsed. More
Image
Published: 01 June 2019
Fig. 6 Section of angle iron in truss which failed at splice. More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001524
EISBN: 978-1-62708-221-1
... Abstract A 140 ft. (42.7 m) long boom on a dragline crane used in coal strip-mining operations failed. One of the principal load-bearing longitudinal beams or chords of the trussed boom had fractured adjacent to a bolt hole at a location about halfway along the length of the boom. Over...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001544
EISBN: 978-1-62708-219-8
... Abstract A large crack developed at a girder-truss joint area of the Fremont bridge in Portland, OR, on 28 Oct 1971. It occurred during a positioning procedure involving a junction piece welded to a girder, starting as a brittle fracture and terminating in plastic hinges in the girder web welds...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001611
EISBN: 978-1-62708-219-8
... Recently, construction of a two-story building was in the intermediate stages of completion. The structural truss members for the second floor were being fabricated and erected. After approximately 30% of the truss members had been erected in a sequential manner, a fracture was noted on one flange section...
Image
Published: 30 August 2021
Fig. 5 The I-5 bridge over the Skagit River before collapse. Two fracture-critical main trusses are noted. Source: Ref 16 More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001777
EISBN: 978-1-62708-241-9
... based on the integrity of the front and rear ties, as well as the boom and the mast. The structure is balanced by a system of trussed beams connected to the mast. Any failure of these elements may lead to a loss of balance. As a result, a global catastrophic collapse may occur because the structural...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001149
EISBN: 978-1-62708-232-7
... to and completely encircled the duct. The saddles were mounted on a structural steel truss. Fig. 2 Schematic representation of the south duct showing supports and expansion joints. The upper inlet (hot) portion of the duct is horizontal, with an inside diameter (ID) of 2.2 meters (7.25 feet). Each...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006833
EISBN: 978-1-62708-329-4
..., revised welding and inspection standards, and better fatigue design. As of 2005, approximately 11% of steel bridges in the United States contain fracture-critical members ( Ref 15 ). In general, any bridge with only two main load-carrying girders or trusses probably has fracture-critical members...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003513
EISBN: 978-1-62708-180-1
..., these sections are used as tension chords of trusses in such construction. The material fracture toughness, from tests on compact tension specimens taken from the flange-web core was linked to the estimation of the critical crack size in the section through an elastic-plastic structural-integrity analysis...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.9781627083294
EISBN: 978-1-62708-329-4
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003501
EISBN: 978-1-62708-180-1
... the principles to accomplish the desired functionality. For example, suppose the required function is simply to support a load over an open space. In this case, the physical model could be a beam of uniform cross section or truss. In addition, there is not usually a unique solution for implementing a physical...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003528
EISBN: 978-1-62708-180-1
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006800
EISBN: 978-1-62708-329-4
... the principles to accomplish the desired functionality. For example, suppose the required function is simply to support a load over an open space. In this case, the physical model could be a beam of uniform cross section or a truss. In addition, there is not usually a unique solution for implementing a physical...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006768
EISBN: 978-1-62708-295-2
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006753
EISBN: 978-1-62708-295-2
... and recalculation of the loads and stresses in gusset plates of all steel truss bridges in the United States and led to significant changes in state and federal rules for evaluating, modifying, and maintaining new and existing bridge structures. The objective evaluation also dispelled a strongly held belief...