Sunday, 26 March 2017

Fasteners, joints.

Fasteners

We use ordinary household appliances in our everyday life. Joint compound are used to tie two or more materials together in those appliances. The joints are divided into two types:
  1. Permanent joints - welding joints, riveted joints. These joints will damage both joint and the joint compound.
  2. Non-permanent joints - fasteners are usually used for the non-permanent joints. It will not damage the joint and the joint compound. Nuts and bolts, clamps and screws are some examples for the fasteners.



Nail Screw Bolt with nut and washer Clamp
Material used Iron, galvanized iron, stainless iron Stainless steel, brass, titanium and bronze Carbon steel, alloy steel, boron steel Brass, stainless steel
Usage Usually used in wood joins Usually used to connect wood compounds Usually used to connect the steel compounds Usually used in carpentry, welding and piping industry
Types of fasteners Common nails, roofing nails, casting nails, finishing nails, etc. Recess type, head type, thread type and point type Compression bolt, self-drilled bolt, wedge bolt, sleeve bolt c-clamps, bar clamps, pipe clamps
Strength Not good for high loading joints usually used to resist the shear Used for simple joints Used to resist the shear and tension joints Used to resist the compression and shear
Durability Short term, difficult to remove Higher than nails. Easy to remove Higher than screw. Easy to remove Higher than bolts, very easy to fix and remove