Brief:
Design and build a pin jointed truss structure, IE: bridge with 25 units of 4mm x 4mm x 600mm Pine sticks and Pratley Quickset Clear Epoxy Resin to take maximum load applied from a loading harness that is fitted in the middle of the bridge. The structure must comply with the supplied specifications, constraints and specification diagrams.
Specifications:
a) The bridge must be 750mm long with 50mm of each side of the bridge sitting on the support/table.See figure 2
b) The loading harness must fit the bridge and allow the apparatus to pass through the sidewall of the bridge on the level plane. See figure 1a and 1b, 2 and 3.
c) The bridge must be between 70mm and 135mm wide.See figure 3.
Constraints (limitations):
d) The height of the top truss may not be higher than 250mm from the line of where the bridge feet touch the supports that the bridge rests on. In this case two school desks.See figure 2.
e) The depth of the bottom truss may not be deeper than 80mm from the line of where the bridge feet touch the supports that the bridge rests on to allow the loading harness to fit through the wall of the bridge.See figure 2.
f) No members may be laminated together for their full length. The only allowable lamination is for a maximum of 10mm long with a distance of at least 50mm clear space before the start of the next cross member spacer.See figure 5.
g) Bracing against the desk supports is not allowed.See figure 4.
h) Glue fillets against the outside of a joint may not exceed 1.8 mm in height and width.See figure 6.
i) No continuous lamination of wood may be used. That means you may not just glue two sticks together in their length.
j) Glue fillets must not be larger than 1.8mm in size.
k) You may use only the supplied 25 sticks.
l) You may only use one set of Pritley Pratley quickset clear epoxy resin glue tubes.
