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AMERICAN Fastite® Joint Pipe <br />Allowable Joint Deflection <br />-- - ---- -- Y <br />-- T <br />— y <br />— X <br />Table No. 2-3 <br />Maximum Recommended Deflectiont <br />Nominal <br />Standard Bell <br />Special Deflection Bell <br />Size <br />Laying <br />X <br />Offset per <br />Y <br />Radius <br />of <br />X <br />Offset per <br />Y <br />Radius <br />of <br />in. <br />Length <br />ft <br />Nominal <br />Deflection <br />Angle <br />Curve* <br />Nominal <br />Deflection <br />Angle <br />Curve* <br />Length in. <br />ft. <br />Length in. <br />ft. <br />4 <br />18 <br />19 <br />5° <br />206 <br />6 <br />20 <br />21 <br />5° <br />230 <br />8 <br />20 <br />21 <br />5° <br />230 <br />10 <br />20 <br />21 <br />5° <br />230 <br />12 <br />1 20 <br />21 <br />5° <br />1 230 <br />14 <br />20 <br />21 <br />5° <br />230 <br />16 <br />20 <br />21 <br />5° <br />230 <br />18 <br />20 <br />21 <br />5° <br />230 <br />20 <br />20 <br />21 <br />5° <br />230 <br />24 <br />20 <br />21 <br />5° <br />230 <br />30 <br />20 <br />21 <br />5° <br />230 <br />- <br />- <br />36 <br />20 <br />17 <br />4° <br />285 <br />21 <br />5° <br />230 <br />42 <br />20 <br />12 <br />3° <br />380 <br />21 <br />5° <br />230 <br />48 <br />20 <br />12 <br />3° <br />380 <br />17 <br />4° <br />285 <br />54 <br />20 <br />12 <br />3° <br />380 <br />17 <br />4° <br />285 <br />60 <br />20 <br />12 <br />3° <br />380 <br />17 <br />4° <br />285 <br />64 <br />20 <br />12 <br />3° <br />380 <br />17 <br />4° <br />285 <br />*Approximate radius of curve produced by a succession of nominal lengths of pipe fully deflected. <br />tSpecial Deflection Bells must be specifically ordered and will be marked with white bell face for easy identification. <br />For easiest assembly, the joints should be assembled with the pipe in reasonably straight alignment. After joint <br />assembly, the pipe may be deflected up to the maximum shgwn above. Offset distances are based on 20' lengths. <br />Maximum Allowable Separation <br />Table No. 2-4 <br />Size <br />in. <br />S Separation <br />in. <br />4 <br />6 <br />/s <br />8 <br />10 <br />'%a <br />12 <br />1% <br />14 <br />1'A6 <br />16 <br />1X <br />18 <br />1'A <br />20 <br />1% <br />24 <br />2% <br />30 <br />2% <br />36 <br />2% <br />42 <br />2% <br />48 <br />2X <br />54 <br />2% <br />60 <br />3A <br />64 <br />1 3% <br />Maximum Allowable Separation, "S", in Standard Bell pipe is <br />approximately equal to the median pipe diameter in inches <br />times the sine of the deflection angle. This is provided for <br />information only and should not be used to determine precise <br />joint deflection. <br />R = Radius of Curve (ft.) <br />Y = Deflection Angle (degrees) <br />Radius of Curve = Nominal Laying Length <br />2 x Tangent (Y + 2) <br />2-9 <br />