• CN101234876B - Method for preparing antiskid wearable ...

    The invention relates to an anti-sliding, wear-resistant and light steel box girder bridge deck pavement and a preparation method thereof, which is characterized in that the method includes the following steps: 1) preparation of high toughness and high strength lightweight aggregate concrete and cement paste on a basalt bare stone surface layer: a. the high toughness and high strength ...

  • WisDOT Bridge Manual Chapter 24 – Steel Girder Structures

    24.1.2 Structural Action of Steel Girder Structures . Box girder, rolled girder and plate girder bridges are primarily flexural structures which carry their loads by bending between the supports. The degree of continuity of the steel girders over their intermediate supports determines the structural action within the steel bridge. The main

  • NEW METHOD OF FIELD WELDING STEEL BOX GIRDER …

    Steel Structures Department, Mitsubishi Heavy Industries Ltd., (Yokohama Dockyard & Machinery Works) ABSTRACT The t ransvers joints of the box-girders with steel-deck-plates are joined with the three connec­ tion methods of 1) Bolted Connection, 2) Welding Connection and 3) Bolted and Welding …

  • EXAMPLE 1: THREE-SPAN CONTINUOUS STRAIGHT …

    Specifications and only straight steel bridges are covered in the provisions as of this writing. The Third Edition of the design specifications, to be published in 2004, will contain a complete set of new provisions for the design of straight steel I- and box-section flexural members within …

  • Ultimate strength assessment of corroded box girders ...

    Jan 15, 2013· The box girders, analysed here, consist of three bays. The deck panel is stiffened with five longitudinal flat bars with a spacing of 150 mm.The side panel is stiffened with two stiffeners on a distance of 300 and 500 mm, respectively and the bottom panel is stiffened with one stiffener in the middle, as may be seen in Fig. 1.The principal characteristics of the analysed box girders are given ...

  • Crane Girder Design

    Mar 01, 2018· The vast majority of crane girder performance issues occur at the crane girder to column connection. 3 4 Column or Bracket Support • Do not use framed or clip angle type connections. • Extend bearing stiffeners the full height of the girder • Weld to the girder top flange with full penetration welds or welds sized for the wheel loads.

  • Design by allowable stress method as per IS: 800 - 1984

    Design of Steel Structures Prof. S.R.Satish Kumar and Prof. A.R.Santha Kumar Problem 1 Indian Institute of Technology Madras Design a hand operated overhead crane, which is provided in a shed, whose details are: Capacity of crane = 50 kN Longitudinal spacing of column = 6m Center to center distance of gantry girder = 12m Wheel spacing = 3m

  • Lecture 8.5.1: Design of Box Girders - UL FGG

    Each box girder has longitudinal stiffening on the compression flange (Figure 3). a wide box girder, to facilitate fabrication, with the top flange formed by the concrete deck slab (Figure 1). The box girder with an orthotropic deck is closed during all stages of erection (Figure 4).

  • Design Guidelines for Steel Trapezoidal Box Girder Systems

    applications in which the girders have been used in straight bridge applications to match adjacent prestressed concrete U-beams. In these cases, straight steel box girders are used in regions where the clear span requirements preclude the use of the concrete U-beams. 17. Key Words Steel, Box Girders, Trapezoidal, Torsional 18. Distribution ...

  • weld check for steel box girder – overhead gantry crane ...

    weld check for steel box girder 6mm fillet weld on both sides of the web, 90 mm hit and 110 mm miss. The average shear resistance per mm is (90−12)/200 × 1.01 = 0.39 > 0.37 kN/ mm – OK.

  • GUIDELINES ON FABRICATION OF STEEL GIRDERS FOR ...

    FABRICATION OF STEEL GIRDERS The fabrication of steel girder bridges is being done by various Railway Workshops as well as through trade. The fabrication is governed by the provisions of; i) Indian Railway Standard specification for fabrication and erection of steel girder bridges and locomotive turn-tables. (B1-2001).

  • Design Optimization of Box Girder in Gantry Crane using ...

    Figure 2: Crane Girder The box section of girder is fabricated by welding the steel plates with each other and then after completion of box section rail is welded on top flange of the girder to facilitate the trolley movement. It should be noted that, it is not necessary to have the girder of box section only. It may be of I beam shape, tapered ...

  • steel crane box girder - Structural engineering general ...

    Jan 11, 2008· RE: steel crane box girder. graybeach (Structural) 10 Jan 08 13:50. It could be that the diaphragm braces the compression zone and is not needed in the tension zone, and/or maybe the stiffener was not welded to the tension flange so as not to decrease the allowable stress range. This assumes that the bottom of the box girder is in tension.

  • Welded Beam Splice – Structural Detailer

    When Splicing Large Plate-Girders an option is to butt-weld the flange plates while bolting the web-plates. In connections such as this, the web-plates must be bolted first, followed by the flange Butt-Weld, and finishing by welding the web to the flange at the joint.. For such connections, it's common practice to provide 'weld access holes' at the flange joint to facilitate the ...

  • A novel field box girder welding robot and realization of ...

    The welding forming control in field all-position welding of steel box girder can be realized successfully based on visual servo-control. Abstract. Box-type steel structure has been widely applied in the field of buildings and bridges because of its unique advantages. However, there are still many problems in field welding that need to be solved.

  • Chapter 6 Structural Steel Contents

    This chapter primarily covers design and construction of steel plate and box girder bridge superstructures. Because of their limited application, other types of steel superstructures ... the designer will need to check the ... Standard Symbols for Welding, Brazing, and .

  • Box girder bridges - SteelConstruction.info

    weld check for steel box girder lifting chain sizes Grade 8 Lifting Chain – Chain Diameter 7mm to 32mm, WLL 1500kg to 31500kg – Grade 'T' (8/80) alloy steel lifting chain specifically Help – Chain Length (m).Lifting Chain & Components mechanical properties of Grade T Chain specified in Australian Standard AS 2321.

  • Technical Fabrication Issues with Steel Orthotropic Box ...

    The weld is subject to both normal forces and bending moments. Fatigue damage to this weld can cause significant damage to the function of the composite behavior of the steel girder box and its pavement. In addition, the repair of such a weld is extremely costly should this weld experience any fatigue damage.

  • Box girders | Civil Engineering

    Mar 12, 2015· For steel box girders, the girders are normally fabricated off site and lifted into place by crane, with sections connected by bolting or welding. If a composite concrete bridge deck is used, it is often cast in-place using temporary falsework supported by the steel girder.

  • G 9.1 - Steel Bridge Bearing Design and Detailing Guidelines

    2. The bearings are attached to the girder; by field welding or bolting. 3. Masonry plates and anchor rods are not normally required. 4. The bearing bears directly on the concrete substructure. 5. Lateral forces on expansion bearings are restrained by means of friction, keeper angles, or …

  • A study on the prediction of welding effects in steel box ...

    Complex box girder components are critical components for equipment used in industries such as heavy machinery, special containers, ships, bridges, and heavy-duty vehicles [1] [2][3][4]. Welding ...

  • Steel Box Beam Assembling Machine | Steel Box Beam Welding ...

    Jinfeng developed the steel box beam assembling machine according to the processing feature of the box girder. This machine is the key equipment for box girder production. It is mainly used for box girder assembly. Technical parameter. Box beam width. 300-1200mm. Box beam height. 300-1200mm. Box …

  • CN101713169A - Method for manufacturing segmental box ...

    The invention discloses a method for manufacturing a segmental box girder, which mainly comprises the following steps of: (A) prefabricating a first segmental block on a short-line pedestal; (B) prefabricating a second girder block on a long-line pedestal by taking the first segmental block as the matched girder; (C) prefabricating a third block on the long-line pedestal by taking the second ...

  • LRFD Design example for steel girder superstructure bridge ...

    Girder Configuration Design Step 1.5 Includes: Select steel girder types Girder spacing Approximate girder depth Check vertical clearance Yes No Return to Main Flowchart Plan for Bridge Aesthetics S2.5.5 Design Step 1.6 Considerations include: Function Proportion Harmony Order and rhythm Contrast and texture Light and shadow Chart 1

  • CN101234876B - Method for preparing antiskid wearable ...

    The invention relates to an anti-sliding, wear-resistant and light steel box girder bridge deck pavement and a preparation method thereof, which is characterized in that the method includes the following steps: 1) preparation of high toughness and high strength lightweight aggregate concrete and cement paste on a basalt bare stone surface layer: a. the high toughness and high strength ...

  • WisDOT Bridge Manual Chapter 24 – Steel Girder Structures

    24.1.2 Structural Action of Steel Girder Structures . Box girder, rolled girder and plate girder bridges are primarily flexural structures which carry their loads by bending between the supports. The degree of continuity of the steel girders over their intermediate supports determines the structural action within the steel bridge. The main

  • NEW METHOD OF FIELD WELDING STEEL BOX GIRDER …

    Steel Structures Department, Mitsubishi Heavy Industries Ltd., (Yokohama Dockyard & Machinery Works) ABSTRACT The t ransvers joints of the box-girders with steel-deck-plates are joined with the three connec­ tion methods of 1) Bolted Connection, 2) Welding Connection and 3) Bolted and Welding …

  • EXAMPLE 1: THREE-SPAN CONTINUOUS STRAIGHT …

    Specifications and only straight steel bridges are covered in the provisions as of this writing. The Third Edition of the design specifications, to be published in 2004, will contain a complete set of new provisions for the design of straight steel I- and box-section flexural members within …

  • Ultimate strength assessment of corroded box girders ...

    Jan 15, 2013· The box girders, analysed here, consist of three bays. The deck panel is stiffened with five longitudinal flat bars with a spacing of 150 mm.The side panel is stiffened with two stiffeners on a distance of 300 and 500 mm, respectively and the bottom panel is stiffened with one stiffener in the middle, as may be seen in Fig. 1.The principal characteristics of the analysed box girders are given ...

  • Crane Girder Design

    Mar 01, 2018· The vast majority of crane girder performance issues occur at the crane girder to column connection. 3 4 Column or Bracket Support • Do not use framed or clip angle type connections. • Extend bearing stiffeners the full height of the girder • Weld to the girder top flange with full penetration welds or welds sized for the wheel loads.

  • Design by allowable stress method as per IS: 800 - 1984

    Design of Steel Structures Prof. S.R.Satish Kumar and Prof. A.R.Santha Kumar Problem 1 Indian Institute of Technology Madras Design a hand operated overhead crane, which is provided in a shed, whose details are: Capacity of crane = 50 kN Longitudinal spacing of column = 6m Center to center distance of gantry girder = 12m Wheel spacing = 3m

  • Lecture 8.5.1: Design of Box Girders - UL FGG

    Each box girder has longitudinal stiffening on the compression flange (Figure 3). a wide box girder, to facilitate fabrication, with the top flange formed by the concrete deck slab (Figure 1). The box girder with an orthotropic deck is closed during all stages of erection (Figure 4).

  • Design Guidelines for Steel Trapezoidal Box Girder Systems

    applications in which the girders have been used in straight bridge applications to match adjacent prestressed concrete U-beams. In these cases, straight steel box girders are used in regions where the clear span requirements preclude the use of the concrete U-beams. 17. Key Words Steel, Box Girders, Trapezoidal, Torsional 18. Distribution ...

  • weld check for steel box girder – overhead gantry crane ...

    weld check for steel box girder 6mm fillet weld on both sides of the web, 90 mm hit and 110 mm miss. The average shear resistance per mm is (90−12)/200 × 1.01 = 0.39 > 0.37 kN/ mm – OK.

  • GUIDELINES ON FABRICATION OF STEEL GIRDERS FOR ...

    FABRICATION OF STEEL GIRDERS The fabrication of steel girder bridges is being done by various Railway Workshops as well as through trade. The fabrication is governed by the provisions of; i) Indian Railway Standard specification for fabrication and erection of steel girder bridges and locomotive turn-tables. (B1-2001).

  • Design Optimization of Box Girder in Gantry Crane using ...

    Figure 2: Crane Girder The box section of girder is fabricated by welding the steel plates with each other and then after completion of box section rail is welded on top flange of the girder to facilitate the trolley movement. It should be noted that, it is not necessary to have the girder of box section only. It may be of I beam shape, tapered ...

  • steel crane box girder - Structural engineering general ...

    Jan 11, 2008· RE: steel crane box girder. graybeach (Structural) 10 Jan 08 13:50. It could be that the diaphragm braces the compression zone and is not needed in the tension zone, and/or maybe the stiffener was not welded to the tension flange so as not to decrease the allowable stress range. This assumes that the bottom of the box girder is in tension.

  • Welded Beam Splice – Structural Detailer

    When Splicing Large Plate-Girders an option is to butt-weld the flange plates while bolting the web-plates. In connections such as this, the web-plates must be bolted first, followed by the flange Butt-Weld, and finishing by welding the web to the flange at the joint.. For such connections, it's common practice to provide 'weld access holes' at the flange joint to facilitate the ...

  • A novel field box girder welding robot and realization of ...

    The welding forming control in field all-position welding of steel box girder can be realized successfully based on visual servo-control. Abstract. Box-type steel structure has been widely applied in the field of buildings and bridges because of its unique advantages. However, there are still many problems in field welding that need to be solved.

  • Chapter 6 Structural Steel Contents

    This chapter primarily covers design and construction of steel plate and box girder bridge superstructures. Because of their limited application, other types of steel superstructures ... the designer will need to check the ... Standard Symbols for Welding, Brazing, and .

  • Box girder bridges - SteelConstruction.info

    weld check for steel box girder lifting chain sizes Grade 8 Lifting Chain – Chain Diameter 7mm to 32mm, WLL 1500kg to 31500kg – Grade 'T' (8/80) alloy steel lifting chain specifically Help – Chain Length (m).Lifting Chain & Components mechanical properties of Grade T Chain specified in Australian Standard AS 2321.

  • Technical Fabrication Issues with Steel Orthotropic Box ...

    The weld is subject to both normal forces and bending moments. Fatigue damage to this weld can cause significant damage to the function of the composite behavior of the steel girder box and its pavement. In addition, the repair of such a weld is extremely costly should this weld experience any fatigue damage.

  • Box girders | Civil Engineering

    Mar 12, 2015· For steel box girders, the girders are normally fabricated off site and lifted into place by crane, with sections connected by bolting or welding. If a composite concrete bridge deck is used, it is often cast in-place using temporary falsework supported by the steel girder.

  • G 9.1 - Steel Bridge Bearing Design and Detailing Guidelines

    2. The bearings are attached to the girder; by field welding or bolting. 3. Masonry plates and anchor rods are not normally required. 4. The bearing bears directly on the concrete substructure. 5. Lateral forces on expansion bearings are restrained by means of friction, keeper angles, or …

  • A study on the prediction of welding effects in steel box ...

    Complex box girder components are critical components for equipment used in industries such as heavy machinery, special containers, ships, bridges, and heavy-duty vehicles [1] [2][3][4]. Welding ...

  • Steel Box Beam Assembling Machine | Steel Box Beam Welding ...

    Jinfeng developed the steel box beam assembling machine according to the processing feature of the box girder. This machine is the key equipment for box girder production. It is mainly used for box girder assembly. Technical parameter. Box beam width. 300-1200mm. Box beam height. 300-1200mm. Box …

  • CN101713169A - Method for manufacturing segmental box ...

    The invention discloses a method for manufacturing a segmental box girder, which mainly comprises the following steps of: (A) prefabricating a first segmental block on a short-line pedestal; (B) prefabricating a second girder block on a long-line pedestal by taking the first segmental block as the matched girder; (C) prefabricating a third block on the long-line pedestal by taking the second ...

  • LRFD Design example for steel girder superstructure bridge ...

    Girder Configuration Design Step 1.5 Includes: Select steel girder types Girder spacing Approximate girder depth Check vertical clearance Yes No Return to Main Flowchart Plan for Bridge Aesthetics S2.5.5 Design Step 1.6 Considerations include: Function Proportion Harmony Order and rhythm Contrast and texture Light and shadow Chart 1