Autoquip FREIGHTLIFT FLM - Manual (Page 47)

47
WARNING !
Do not weld on the guide flanges of the masts. The field welding of
any structural steel member into or across the guide beams in the
path of the wheel guides is strictly forbidden. Interfering with the
free travel of the wheel guides could create severe structural
damage or cause the lifting chains to over-stress and fail resulting
in permanent lift damage and/or severe injury to personnel
INSTALLATION INSTRUCTIONS