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Drainage Grates
R-4370 Series
Type C Type D Type E Type G
 

Heavy Duty Round Drainage Grates

 

Most grates listed can be furnished with lightweight cast iron angle frames when specified.

Frame is of 1/2” metal as shown on page 266.

 
Dimensions in Inches  
Catalog 
No.  Type 
R-4370-1  6 3/8 1 1/4 1 x 1   1 / 2
R-4370-2  9 1/2 2 1/2 1 1/2 x 3 1/2   7 / 8
R-4370-3§  15 1 1/4 1 x 12 1/4  1
R-4370-4  15 1 1/4 3/4 x 2 1/4   3 / 4
R-4370-5  18 1 1/2 1 x 4 1/2  1 1/4
R-4370-6*  19 1/2 1 1/2 3/4 x 5 1/4   3/ 4
R-4370-7  20 1 3/8 2 x 2  1
R-4370-8  21 1 1/4 3/4 x 19 1/2   3/ 4
R-4370-9  22 1 1/2 1 1/8 1
R-4370-10  22 1 1/2 1 1/4 1
R-4370-12  22 1 1/2 1 3/8 x 5  1
R-4370-13*  22 1 1/2 2 x 6  1 1/4
R-4370-15  22 1/2 1 3/4 1 1/8 1
R-4370-17  22 3/4 1 3/4 1 1/2 1
R-4370-18§  22 3/4 1 3/4 1 1/2  7 / 8
R-4370-21  23 1 1/2 1 1/4 1
R-4370-22  23 1 3/4 1 1 1/8
R-4370-23  24 1 1/2 2 1/4 x 2 1/4  1 1/2 Special 
R-4370-25  29 3  3 / 4 1
R-4370-26  33 2 1 1/2 1
R-4370-27A  38 1 1/2 1 1
§Not recommended for bicycle traffic. 
*Rated as Light Duty - not Heavy Duty.   
 
  
Free Open Area Tables
To Calculate Drainage Water Flow
Listed by Product Number

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