MDI Work Zone Safety Products 
17
1.800.521.6776 // www.mditrafficcontrol.com
 //STANDARD SIGN LEGENDS//
MDI Compact signs include foldable crossbracing.  
Turn to page 9 for more information on  
MDI Compact Collapse & Wrap sign system.
MDI Compact® Sign Material Prefixes  
DCF     Oralite Super Bright
DCM	
ORALITE Marathon
DuraLatch signs and crossbracing are sold separately.  
See page 19 for crossbracing options.
DuraLatch® Sign Material Prefixes
DF	
ORALITE Super Bright
DFM 	
ORALITE Marathon 
DF3	
3M Diamond Grade
Sewn pocket signs include the crossbrace.
Plastic pocket signs include the crossbrace.
Plastic Pocket Sign Material Prefixes
	
3-Pocket	
4-Pocket
P3F	
ORALITE Super Bright	
P4F	
ORALITE Super Bright
P3FM	 ORALITE Marathon 	
P4FM	 ORALITE Marathon
P3F3	 3M Diamond Grade 	
P4F3	 3M Diamond Grade
P3N	
Non-Reflective 	
P4N	
Non-Reflective
Sewn Pocket Sign Material Prefixes
	
3-Pocket	
4-Pocket
S3F	
ORALITE Super Bright	
S4F	
ORALITE Super Bright
S3FM	 ORALITE Marathon	 	
S4FM	 ORALITE Marathon
S3F3	 3M Diamond Grade		
S4F3	 3M Diamond Grade
UTILITY WORK AHEAD
36" ______-04203
48" ______-04204
WORK AREA AHEAD
36" ______-03644
48" ______-03645
WORKER - SYMBOL
36" ______-03640
48" ______-03641
WORKERS AHEAD
36" ______-03989
48" ______-04091
CUSTOM LEGENDS AVAILABLE
Call 800-521-6776 for details
Choice of four sign materials.
To ensure that you receive the correct material for your chosen 
sign, simply fill in the blank ____ before the part number with the 
appropriate material prefix as listed below:
Non-
Reflective
3M Diamond 
Grade 
White
3M Diamond 
Grade 
Orange
ORALITE 
Marathon 
White
ORALITE 
Marathon 
Orange
ORALITE 
Super Bright 
White
ORALITE® 
Super Bright 
Orange

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