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Heat straightening Wellington Bridge

Heat straightening Wellington Bridge

Wellington Bridge Repairs, Highways Agency, Area 6 Heat Straightening Regions of both plastic and elastic deformation are likely to co-exist in the steelwork of bridges that suffer severe vehicle strikes, and particularly so in the case of bridges with concrete composite decks. A fundamental principle of heat-straightening is that heat should only be applied to [...]

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The effect of Heating Temperature in Steel Bridge Repairs

The effect of Heating Temperature in Steel Bridge Repairs

650oC is the maximum heating temperature specified in most international fabrication standards for the steel grades typically used in bridge construction. It is also the temperature recommended by Federal Highways in their technical guide for heat straightening damaged steel bridges.   It’s an operating temperature that gives a good balance between effectiveness and caution. Nothing [...]

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The use of a Hover-Platform in Bridge Construction

I was going through some old files recently and found the photograph below of one of the Avonmouth Bridge site hover-platforms. There were two of these devices used to transport box girders from the assembly areas to their erection points on the site in the early 1970’s. This was the first time that the hover [...]

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Assumptions and Approximations

If you get the opportunity to attend one of Professor Bill Harvey’s lectures on masonry structures I suggest that you don’t let it slip by. Bill’s lectures are both informative and entertaining, and often start with the following cautionary quote from Dr AR Dyke, who when addressing the Institution of Structural Engineers in 1976 made [...]

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Heat-straightening technology (1 of 3)

Heat Straightening Technology

My first experience of the heat-straightening process in steel bridgework was in 1971. I was working with a very experienced plater setting up the joint between a pair of large box girders. As the junior site engineer my job was to align the boxes correctly with theodolite and level. The plater and his helper would [...]

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