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Section Beams are made of steel and they have a specific lengths and shapes like I-beam, L, C-channel and I flanged beam. These types of section are usually used in steel structures and it is common to connect them with plates of steel.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/7/79/Bassem_Adel_Sa%27eed_in_2007.jpg/250px-Bassem_Adel_Sa%27eed_in_2007.jpg)
Joints
editThere are three connection types:
Rivets are the strongest and most common type.[1] [citation needed]
Safety
editThere are some calculation methods to determine whether the design and construction of the truss is safe.
[1] [citation needed]