PACIFIC MARINE & INDUSTRIAL ®      
 
Engineering Department Email:
 
Drainage Grates
R-4380 Series
 

Light Duty Round Drainage Grates, Flat Bar Type

 

Angle frame as shown can be furnished with many grates as noted.

Special frame anchors furnished on request.

 

Specify: Catalog Number and angle frame when required.

 
 
Dimensions in inches  
Catalog 
No. 
R-4380-AA1  3 3/4  3 / 8  3 / 8  3 / 8
R-4380-A  4  1 / 2  3 / 8  3 / 8
R-4380-A1  4 3/4  3 / 8  1 / 2  3 / 8
R-4380-B1  5  1 / 2  1 / 2  1 / 2
R-4380-1  5 1/2  1 / 2  1 / 2  1 / 2
R-4380-3  6 1  1 / 2  3 / 4
R-4380-4  8  1 / 2  5 / 8  5 / 8
R-4380-4A1  8 1/2  3 / 4 1 1
R-4380-4A  10  3 / 4  1 / 2  1 / 2
R-4380-6  10 1/2  3 / 4 3 1/2 x 1 1/2   3 / 4
R-4380-7  11 3/4 1 3/4 x 4 1/4  1
R-4380-8§  12 1/2 1 1 1
R-4380-9  14 1/4  3 / 4 1 1
R-4380-10  15  5 / 8  3 / 4  3 / 8
R-4380-11  15 1  5 / 8  3 / 4
R-4380-12  15 1/4  1 / 2  5 / 8  3 / 8
R-4380-13  16 1 1 1/8 1
R-4380-13A  17 3/4  1 / 2 1 x 3 1/2   1 / 2
R-4380-14  18  3 / 4  7 / 8  3 / 4
R-4380-15§  18 1 1 1/8 1 1/4
R-4380-16  19  1 / 2  3 / 4 1
R-4380-17  19 1  3 / 4  1 / 2
R-4380-18  20 1 2 x 2  1 1/4
R-4380-21§  24  3 / 4 1 1/4  5 / 8
R-4380-22  26 5/8  3 / 4  7 / 8  3 / 4
R-4380-23  28 1 2 1/8 x 4  2
R-4380-24  30  3 / 4  7 / 8  3 / 4
R-4380-25§  32  3 / 4 1 3/8 1
R-4380-26§  33 1/2  3 / 4 1 3/8 1
R-4380-32  39 3/4 3 1/2 1 1
§Not recommended for bicycle traffic.   
 
 
  
Free Open Area Tables
To Calculate Drainage Water Flow
Listed by Product Number

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