There is a rule in DIN VDE 1985 for deflection limitation :
1- (L&H) suspention towers : 4.5% of height
2- Tension and D.E. towers : 2.5% of height
But there is no limitation for deflection in ASCE MANUAL No. 72 and 52.
H. Namiranian
Normaly there is some specification for splice plate connection.
1- minimum and maximum cen-cen bolt distances.
2- Max. of shear on the connection. (No. of Bolts)
3- thick. of plate shoul be checked for bearing stress.
4- Net area of main member should be checked after chosing the bolt arrangement.
I had some problem like this.
I modeled the tower with staad-3 and then change the geometry by a simple program . then a ".dxf" file will prepared for autocad.