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M o d e l N o . M E - 6 9 9 1
9
Roof Truss
.
Use #4 and #5 beams to
build a simple roof truss or
a roof truss structure with
legs
Common Truss Bridges
Warren Bridge
The Warren Bridge (Figure 17) is a simple type of
bridge consisting of a series of triangles. However, a
simple Warren Bridge is not practical for supporting a
deck (road bed). Vertical members can be added to
support the deck. Additional verticals can support an
upper deck.
To make a free-standing bridge, begin by laying out
one side of the bridge on a table. Then build the other
side of the bridge. Join the two sides of the bridge
attaching the floor beams and the top cross beams.
Use additional members as piers to support the
bridge. (Figure 18).
.
Different Scales
It is possible to build bridges of two different scales. In
Figure 19 is a Warren with Verticals built to two differ-
ent scales.
#4
#4
#4
#4
#4
#4
#5
#5
#5
Figure 16: Roof truss
#4
#5
#3
#3
#3
#4
Figure 17: (Top) Warren Bridge. (Middle) Warren with
deck verticals. (Bottom) Warren with verticals.
#4
#3
#3
#3
#4
#5
Figure 18: (Left) Free-standing Warren. (Right) Free-standing Warren with deck verticals
#3
#4
#4
#5
Figure 19: Smaller and Larger Scale Warren with Verticals