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This is another highly attractive design to include in your railway. Simply an inverted version of the upright bowstring it can be used with an open deck but it will be greatly enhanced with the addition of a parapet rail at an additional cost. It is certain to add interest to your line and will be a feature that all visiting engines will use for a photo stop.
Examples of this and its counterpart, the upright bowstring bridge, can still be seen along the line of the Penrith, Keswick and Cockermouth Railway. (see below). Although a standard gauge branchline, the track crossed the River Greta eight times using both upright and inverted examples of bowstring bridges. Originally built as straightforward bowstrings they were later strengthened by the addition of plate girders under the deck between the bowstring structures. Our design is purely a bowstring structure however we employ the truss arrangement of vertical and diagonal members rather than crossed diagonal bracing. The side structures consist of an arched beam, sloping upwards section by section from the centre to each end. Vertical and diagonal members support the beam. All sections are of 12mm x 12mm aluminium square section connected by gusset plates rivetted with 2.4 mm blind rivets. The main deck and side structures are supported on sturdy 25mm x 25mm 'T' section beams. Strong 3mm plate feet are provided to give the bridge a firm foundation at each end. 
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PRICES:
Standard Lengths
Bespoke Lengths priced accordingly. Not available under 750mm. Indicate length required on Order Form Double track widths available at single track price plus 35% Optional parapet rails available at £75 per metre of bridge length (i.e. includes both sides) Powder coating available. Estimated price will be supplied on application. |
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