Clamp force divide by surface ?

[joshua]

hi, newbies here !

found clamp load in some catalogue for bolt and screw.

is that value should divide by 2 since bolt is connect 2 surface together ?

by the way, i am try to solidworks simulation,
want to apply force on a surface to see how it respond on that surface
both surface/body is same material

 

[joshua]

another question here:
what if these 2 surfaces are connect with 2 screw
do i multiply the clamp load by 2 again ?