beam splice

huangyhg

beam splice?
how would you design a splice for cold formed/light guage steel c-studs? the studs do not overlap. they want to use stud material on the backside for the splice plate.  
moment=12k-in
rafter is 8" csj.
how many screws? screw pattern?


i don't like that idea at all, but the only way i would even consider it is to have a 2' (just for talking purposes) piece set inside the two pieces to be spliced and screw them together.  that's the most directt load path i can see.
if these are rafters, you might want to consider something similar to pemb roof construction where cold rolled c's or z's are lapped over the supports and extended past the support until the single   
there is no support. the splice location is 4' from a bearing on a 16' span.   
adam...
i understand that, but what i am suggesting is to lap the rafters from each side over the support, similar to pemb construction.
there are some other considerations here that you might want to think about:
are the splices to be done "up in the air" or "on the ground"? i suspect "on the ground" and lifted into place since a worker would need to be on a scaffold if he will make the connection "in the air".
if done "on the ground", then you need to consider stresses in the connection from lifting it into place.
sorry, i'm not familiar with penb construction.  
pemb = pre-engineered metal building  
are you transfering bending and shear through your splce or just shear forces with the one beam cantilevering out the 4' and supporting the 12' span?
i suggest a bent plate in the shape of a channel applied outside of the rafter.  a lap of two feet on each   
buckling could be a big issue for this, make sure that the   
addressing the previous post: i am attempting to transfer bending and shear.
one suggestion was to treat it like an eccentric load on a bolt group. (instantaneous center concept). do you think that is an acceptable theory?
that method would require 10 screws on each side:  
2 horizontal rows of 5 screws. row spaced 6" apart. screw spacing = 2" any thoughts?