Model Bridges for the Narrow Gauge Garden Railway

Our Arched Girder structure offers a slightly different configuration to the Pony Truss and Bowstring designs. In effect it is similar in most aspects to the Pony Truss apart from the obvious gently arched top girder on each of the side elevations. We have kept the maximum height to around 150mm which is roughly shoulder height for most rolling stock.

The bridge is carefully constructed in a range of aluminium sections
The design follows full size practice based on the Pratt Truss
configuration invented in 1844 with vertical members and diagonal
sections that slope towards the centre.

This is a sturdy construction offering a more substantial side structure
than the Bowstring but retaining its gently curved appearance.
It is well capable of carrying heavy locos over a full metre span.
The Arched Girder Bridge would be very much at home in most garden railways.

Arched Girder Bridge (AGB)

Construction

A range of aluminium cross sections are used with joints connected mainly using 2.4mm blind rivets and 6BA brass bolts. Side Truss arched & vertical members 12mm x 12mm square sectionSide Truss diagonal members 12mm x 12mm channel1.5mm plate gussets to all side connectionsMain Truss Girders: inverted 25mm x 25mm 'T' sectionDiagonal braces: 9mm x 9mm angleCross Beams: 16mm x 16mm channelLongitudinal Track Supports: 25mm x 3mm bar

Dimensions

AGB75Length: 750mmExternal width: 240mmInternal width: 175mmOverall height: 160mmInternal height: 140mm6 bays in length

PRICE: £135.00 + p&p
 
 
 
AGB100Length: 1000mmExternal width: 240mmInternal width: 175mmOverall height: 160mmInternal height: 140mm8 bays in length
 
PRICE: £170.00 + p&p

AGB125
Length: 1250mm
Other dimensions as AGB100

PRICE: £205.00 + p&p

AGB150
Length: 1500mm
Other dimensions as AGB100

PRICE: £235.00 + p&p
 
 
 
The bridge is individually made by hand. It is supplied in its bare metal state and can be left to weather naturally or you can prime and paint it. Note we don't supply it highly polished! It bears minor scratches and scuffs from the process of construction which certainly do not detract from the appearance of the bridge.
 
Longitudinal plates are placed at a suitable distance to support 32mm and 45mm gauge track. The bridge does not include any decking but you could easily add your own wooden planking or a zinc diamond pattern grid. The length of the bridge allows it to be supported by the end 10-20mm of the beams.

 The bridge is supplied fully constructed as shown in the photos. Obviously the rolling stock and track are shown for scale purposes only and are not included.
 
 
We would be happy to respond to enquiries for custom made bridges of this design which could be supplied within a three week delivery period. The width can be varied to suit the smaller Mamod size rolling stock or increased to provide a double track.