Excessive premature frame rusting is caused by improper jobsite installation practices and most likely caused by the following circumstances:
Grout:
Frames are grouted in place using incorrec...
CAUTION must be used in investigating this problem - In most cases, excessive field rusting of products is caused by improper storage at the jobsite. That situation must be validated prior to refus...
Yes, an additional jamb anchor can be used at the bottom of the frame in lieu of the typical (adjustable or weld-in) base anchor in fire rated frames.
This is limited to the anchor designed for...
When rust appears, repair the affected surfaces by finish smooth, clean, treat for maximum paint adhesion, and touch up the surfaces with a direct to metal (DTM), rust inhibitive primer.
Prime or painted surfaces which have been scratched or otherwise marred during installation (including field welding) and/or cleaning must be field repaired and re-primed by the installing contractor.