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Gutters and Downspouts:
Expansion Joint Table

Table 4.4.3 Critical Load Table – Expansion Joint Spacing

Determination of gauge and expansion joint location for various sizes and shapes of copper "U" sections

Maximum Distance Between Fixed Point and Expansion Joint in Feet
Weight of Cold Rolled Copper in Ounces Width of Gutter Bottom in Inches Angle of Gutter Sides
90° Max.-
25° Min.		 90° Max.-
35° Min.		 90° Max.-
45° Min.		 90° Max.-
60° Min.		 90° Max.-
90° Min.		 60° Max.-
25° Min.		 60° Max.-
35° Min.		 60° Max.-
45° Min.		 60° Max.-
60° Min.		 45° Max.-
25° Min.		 45° Max.-
35° Min.		 45° Max.-
45° Min.		 35° Max.-
25° Min.		 35° Max.-
35° Min.		 25° Max.-
25° Min.
16 4 19'-
6"		 20'-
6"		 21'-
6"		 23'-
0"		 26'-
0"		 17'-
0"		 18'-
0"		 19'-
6"		 20'-
6"		 16'-
6"		 17'-
0"		 18'-
0"		 13'-
6"		 15'-
0"		 12'-
0"
6 16'-
6"		 17'-
6"		 18'-
6"		 19'-
6"		 21'-
6"		 14'-
0"		 15'-
0"		 16'-
6"		 17'-
6"		 13'-
0"		 14'-
0"		 15'-
0"		 11'-
6"		 12'-
6"		 10'-
6"
8 14'-
0"		 15'-
0"		 16'-
0"		 17'-
6"		 19'-
0"		 12'-
0"		 13'-
0"		 14'-
0"		 15'-
0"		 10'-
6"		 12'-
0"		 13'-
0"		 9'-
6"		 10'-
0"		 8'-
6"
10 12'-
0"		 13'-
0"		 14'-
0"		 15'-
0"		 16'-
6"		 10'-
0"		 11'-
0"		 12'-
0"		 13'-
0"		 9'-
0"		 10'-
0"		 11'-
0"		 7'-
6"		 8'-
0"		 6'-
0"
12 10'-
6"		 11'-
6"		 12'-
0"		 13'-
6"		 14'-
6"		 9'-
0"		 9'-
6"		 10'-
6"		 11'-
6"		 8'-
0"		 9'-
0"		 10'-
0"		 6'-
0"		 7'-
0"		 5'-
0"
14 9'-
6"		 10'-
0"		 11'-
0"		 12'-
0"		 13'-
0"		 7'-
6"		 8'-
6"		 9'-
6"		 10'-
6"		 6'-
6"		 7'-
6"		 8'-
6"		      
16 8'-
6"		 9'-
0"		 10'-
0"		 11'-
0"		 12'-
0"		 7'-
0"		 7'-
6"		 8'-
6"		 9'-
0"		 6'-
0"		 7'-
0"		 7'-
6"		      
 
20 4 25'-
0"		 27'-
0"		 28'-
0"		 30'-
6"		 34'-
0"		 22'-
0"		 24'-
0"		 25'-
0"		 27'-
0"		 20'-
0"		 22'-
0"		 24'-
0"		 17'-
6"		 19'-
6"		 16'-
0"
6 21'-
6"		 23'-
0"		 24'-
0"		 26'-
0"		 29'-
0"		 18'-
6"		 20'-
0"		 21'-
6"		 23'-
0"		 17'-
0"		 18'-
6"		 20'-
0"		 15'-
6"		 17'-
6"		 14'-
0"
8 18'-
0"		 19'-
6"		 20'-
6"		 22'-
0"		 24'-
6"		 15'-
6"		 17'-
0"		 18'-
0"		 19'-
6"		 14'-
0"		 15'-
6"		 17'-
0"		 13'-
0"		 14'-
6"		 11'-
6"
10 15'-
6"		 17'-
0"		 18'-
0"		 19'-
6"		 21'-
6"		 13'-
6"		 15'-
0"		 15'-
6"		 17'-
0"		 12'-
6"		 13'-
6"		 15'-
0"		 11'-
0"		 12'-
6"		 10'-
0"
12 14'-
0"		 15'-
0"		 16'-
6"		 17'-
6"		 19'-
6"		 12'-
0"		 13'-
6"		 14'-
0"		 15'-
0"		 11'-
0"		 12'-
0"		 13'-
6"		 10'-
0"		 11'-
0"		 8'-
6"
14 12'-
6"		 13'-
6"		 14'-
6"		 15'-
6"		 17'-
6"		 11'-
0"		 12'-
0"		 12'-
6"		 13'-
6"		 9'-
6"		 11'-
0"		 12'-
0"		 9'-
0"		 10'-
0"		 8'-
0"
16 11'-
6"		 12'-
6"		 13'-
6"		 14'-
6"		 16'-
0"		 10'-
0"		 11'-
0"		 11'-
6"		 12'-
6"		 9'-
0"		 10'-
0"		 11'-
0"		 8'-
0"		 9'-
0"		 7'-
0"
18 10'-
6"		 11'-
6"		 12'-
6"		 13'-
6"		 14'-
6"		 9'-
0"		 10'-
0"		 10'-
6"		 11'-
6"		 8'-
0"		 9'-
0"		 10'-
0"		      
20 10'-
0"		 10'-
6"		 11'-
6"		 12'-
6"		 14'-
0"		 8'-
6"		 9'-
0"		 10'-
0"		 10'-
6"		 7'-
6"		 8'-
6"		 9'-
0"		      
 
24 4 32'-
0"		 34'-
0"		 36'-
0"		 38'-
6"		 41'-
6"		 28'-
0"		 30'-
0"		 32'-
0"		 34'-
0"		 25'-
6"		 28'-
0"		 30'-
0"		 23'-
6"		 26'-
0"		 21'-
0"
6 27'-
0"		 29'-
0"		 30'-
6"		 33'-
0"		 36'-
0"		 24'-
0"		 26'-
0"		 27'-
0"		 29'-
0"		 22'-
0"		 24'-
0"		 26'-
0"		 20'-
0"		 22'-
0"		 18'-
6"
8 23'-
6"		 25'-
0"		 26'-
0"		 28'-
0"		 31'-
0"		 20'-
0"		 22'-
0"		 23'-
6"		 25'-
0"		 18'-
6"		 20'-
0"		 22'-
0"		 17'-
0"		 19'-
0"		 15'-
6"
10 20'-
6"		 22'-
0"		 23'-
0"		 25'-
0"		 27'-
0"		 18'-
0"		 19'-
6"		 20'-
6"		 22'-
0"		 16'-
6"		 18'-
0"		 19'-
6"		 15'-
0"		 16'-
6"		 13'-
6"
12 18'-
6"		 20'-
0"		 21'-
0"		 22'-
6"		 24'-
6"		 16'-
0"		 17'-
6"		 18'-
6"		 20'-
0"		 14'-
6"		 16'-
0"		 17'-
6"		 13'-
6"		 15'-
0"		 12'-
0"
14 17'-
0"		 18'-
6"		 19'-
6"		 20'-
6"		 22'-
6"		 14'-
6"		 16'-
0"		 17'-
0"		 18'-
6"		 13'-
6"		 14'-
6"		 16'-
0"		 12'-
0"		 13'-
6"		 11'-
0"
16 15'-
6"		 16'-
6"		 17'-
6"		 19'-
0"		 21'-
0"		 13'-
6"		 14'-
6"		 15'-
6"		 17'-
0"		 12'-
6"		 13'-
6"		 14'-
6"		 11'-
0"		 12'-
6"		 10'-
0"
18 14'-
6"		 15'-
6"		 16'-
6"		 18'-
0"		 19'-
6"		 12'-
6"		 13'-
6"		 14'-
6"		 15'-
6"		 11'-
6"		 12'-
6"		 13'-
6"		 10'-
6"		 11'-
6"		 9'-
6"
20 13'-
6"		 14'-
6"		 15'-
6"		 16'-
6"		 18'-
0"		 11'-
6"		 12'-
6"		 13'-
6"		 14'-
6"		 10'-
6"		 11'-
6"		 12'-
6"		 10'-
0"		 10'-
6"		 8'-
6"
22 12'-
6"		 13'-
6"		 14'-
6"		 15'-
6"		 17'-
0"		 11'-
0"		 12'-
0"		 12'-
6"		 13'-
6"		 10'-
0"		 11'-
0"		 12'-
0"		      
24 12'-
0"		 13'-
0"		 14'-
0"		 15'-
0"		 16'-
6"		 10'-
6"		 11'-
6"		 12'-
0"		 13'-
0"		 9'-
6"		 10'-
6"		 11'-
6"		      
 
32 6 46'-
0"		 48'-
6"		 51'-
0"		 54'-
6"		 59'-
6"		 40'-
6"		 43'-
0"		 46'-
0"		 48'-
6"		 37'-
0"		 40'-
6"		 43'-
0"		 36'-
0"		 39'-
6"		 33'-
6"
8 41'-
0"		 44'-
0"		 46'-
0"		 49'-
0"		 53'-
6"		 36'-
6"		 39'-
0"		 41'-
0"		 44'-
0"		 33'-
6"		 36'-
6"		 39'-
0"		 31'-
0"		 34'-
0"		 28'-
6"
10 36'-
6"		 39'-
0"		 40'-
6"		 43'-
6"		 47'-
6"		 32'-
6"		 34'-
6"		 36'-
6"		 39'-
0"		 30'-
0"		 32'-
6"		 34'-
6"		 27'-
6"		 30'-
0"		 25'-
0"
12 33'-
6"		 35'-
6"		 37'-
6"		 39'-
6"		 43'-
0"		 29'-
6"		 31'-
6"		 33'-
6"		 35'-
6"		 27'-
0"		 29'-
6"		 31'-
6"		 25'-
6"		 27'-
0"		 23'-
0"
14 30'-
6"		 32'-
6"		 34'-
6"		 36'-
6"		 40'-
0"		 27'-
0"		 29'-
0"		 30'-
6"		 32'-
6"		 25'-
0"		 27'-
0"		 29'-
0"		 23'-
0"		 25'-
0"		 21'-
0"
16 28'-
6"		 30'-
6"		 32'-
0"		 34'-
0"		 37'-
0"		 25'-
0"		 27'-
0"		 28'-
6"		 30'-
6"		 23'-
0"		 25'-
0"		 27'-
0"		 21'-
0"		 23'-
0"		 19'-
6"
18 27'-
0"		 28'-
6"		 30'-
0"		 32'-
0"		 35'-
0"		 23'-
6"		 25'-
6"		 27'-
0"		 28'-
6"		 21'-
6"		 23'-
6"		 25'-
6"		 20'-
0"		 22'-
0"		 18'-
0"
20 25'-
6"		 27'-
0"		 28'-
0"		 30'-
0"		 33'-
0"		 22'-
0"		 24'-
0"		 25'-
6"		 27'-
0"		 20'-
6"		 22'-
0"		 23'-
6"		 19'-
0"		 20'-
6"		 17'-
6"
22 24'-
0"		 25'-
6"		 27'-
0"		 28'-
6"		 31'-
6"		 21'-
0"		 22'-
6"		 24'-
0"		 25'-
6"		 19'-
6"		 21'-
0"		 22'-
6"		 18'-
0"		 19'-
6"		 16'-
6"
24 23'-
0"		 24'-
6"		 25'-
6"		 27'-
6"		 30'-
0"		 20'-
0"		 21'-
6"		 23'-
0"		 24'-
6"		 18'-
6"		 20'-
0"		 21'-
6"		 17'-
0"		 18'-
6"		 15'-
6"
26 22'-
0"		 23'-
6"		 24'-
6"		 26'-
0"		 28'-
6"		 19'-
0"		 20'-
6"		 22'-
0"		 23'-
6"		 17'-
6"		 19'-
0"		 20'-
6"		 16'-
6"		 18'-
0"		 15'-
0"
28 21'-
0"		 22'-
6"		 23'-
6"		 25'-
0"		 27'-
6"		 18'-
6"		 20'-
0"		 21'-
0"		 22'-
6"		 17'-
0"		 18'-
6"		 20'-
0"		 16'-
0"		 17'-
6"		 14'-
6"

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