◄  Fig. 163 - Lateral loading

of a truss bridge

(demonstration models)

laterally braced

truss bridge ►

(top and bottom views)

top view

 

.

Lateral bracing is also used between the top and bottom chords to resist sideways loading.

.

The following shows different views of the Queenpost railway bridge shown in Fig. 161

previously with the major details identified.

.

Queenpost_truss_bridge.jpg

Queenpost_truss_bridge.jpg

                        a) side view

click image to enlarge

            b) bottom view

.

Fig. 164 - Structural details of a Queenpost railway bridge  (scale visualization model)

.

The top chord of the Queenpost truss also

covered_bridge.gif

provided a plate upon which a roof could be

supported, creating the classic covered bridge.

On the right is a version in which the normally

external diagonal struts are internalized.

Fig. 165 - Covered bridge  ►

(scale visualization model)

 click image to enlarge

.

Like the Kingpost truss bridge, practical limitations on how high the Queenpost truss could

be built limited the distance it could span as a single, non-repeated unit. Improved designs,

like the Howe, Pratt, and Warren truss bridges, employed an expandable design that could

be repeated to span greater distances while keeping their height constant.

.

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Page 104 - Building stability - Queenpost truss bridge

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