An internally lit exit sign requires a minimum letter height of six inches and specific spacing dimensions including three-eighths inch minimum letter spacing, three-quarters inch side clearances, and a two-inch minimum spacing except for the letter 'I'. The sign operates on an emergency power system and remains illuminated at all times.
3/8" MIN. SPACING 6" MIN. 3/4" MIN. 3/4" MIN. 2" MIN EXCEPT FOR THE LETTER "I" NOTES: 1. PROVIDE INTERNALLY LIT SIGN POWERED BY EMERGENCY POWER SYSTEM. 2. SIGN TO REMAIN ILLUMINATED AT ALL TIMES. 1/2" = 1'-0" G005 B4 TOE/KNEE CLEARANCES4
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