I am using double angle verticle braces. I call out spacer blocks (Plate in between the two angles) every 4' (Standard procedure at old job used for years). Wondering what others use for spacing of these spacer blocks?
See also AISC Specification for Structural Steel Buildings section D4 if your braces are in tension. Page 13-2 of AISC Steel Construction Manual Third Edition provides further explanation. This page also notes that a minimum of two stitch-fillers are required.