on a building, it apparently tells firement the building has a (R)egular roof as opposed to a truss roof. Truss roofs tend to colapse in fires, so firemen do not get on top of it.
The triangle is the strongest geometric shape, as it holds its shape and has a base which is very strong. The triangle is common in all sorts of building supports and trusses. If all three sides of a triangle are made of rigid material, the angles are fixed and cannot get larger or smaller without breaking at the joints, unlike a rectangle, for example, which can turn into a parallelogram and even collapse totally. If you take a rectangle and place one diagonal piece from corner to corner, you can make that strong and stable, too, but doing that makes two triangles.
the truss bridge
The type of bridges are: -truss bridge -arch bridge (truss arch bridge) -suspension bridge (suspension truss bridge) -cantilever bridge
the rectangular things on the side are called trusses. so there for the "truss" bridge
truss brige spain
it is a hybrid between an arch bridge and truss bridge. so it is classified as an arch and truss
trussesWarren truss bridge
the truss bridge is a type of beam bridge but since the truss has support(trusses) and the beam barely has support it is stronger.
Glenville Truss Bridge was created in 1885.
there are no disadvantages. the Pratt truss bridge is indestructable
Warren truss bridge