I have received a requirement for preparing the equipment foundation with flatness as below.
Specified tolerances
[FONT=arial]± [/FONT]0.7 mm [FONT=arial]±[/FONT] 0.21 angle [FONT=arial]±[/FONT] 1[COLOR=#333333][FONT=sans-serif]°[/FONT][/COLOR]
Unable to figure out why two values are specified for flatness tolerance. Please can someone give an insight into this flatness tolerance specified.
Thanks in advance
Alphonse