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The space between the circumference of the ~ower inside diameter of the socket and <br />the spigot of the pipe placed in said socket shall be not less than one-half the annular <br />(h) hereof. <br /> (g) pERMISSIBLE VARIATIONS. The permissible variations from the dimensions <br />given in the above table, shall be as stated in the following table: <br /> TABLI~ OF pEI/MIS~IBLE VARIATIONS IN DIMENSIONS FOR VIT2IFI~D <br /> cLIY <br /> Inches Depth of Socket Thickness of Shell Inside Diameter of <br /> Foot (--) Inches (--) Inches (--) Bore Inches (+ -) <br /> <br />Normal Size Length <br />Inches per <br />Col. 1 Col. 2 <br /> <br /> 10" it" <br /> <br /> 15" <br /> lS" ii" <br /> <br />Col. 3 <br /> <br />It" <br />%*, <br /> <br />Col. <br />3-16" <br /> <br />7-16" <br /> <br /> Note: The minuS sign (--) alone indicates that the plus variation is not limited; the <br />plus. and minus sign (-t- --) indicates variation in both excess and deficiency in dimension. <br /> (h) IMPI~RFECTIONS. All pipes and specials must be free from injurious cracks. <br />checks, blisters, broken rims or other imperfections. The /ollowin~ imperfections in <br />pipe or special will be considered injurious and cause /or rejeetinm <br /> (1) A single crack in the body of the' pipe, extending through the entire thickness <br />re~rdlees of the extent of such crack A single fire crack which extends through one-half <br />the thickness and over three (3) inches lor~. <br /> (2) Two or more tlre cracks in the body of the pipe, of a less lrngth than three <br /> (3) inches and extending through one-half (ii) of the thickness. Any fire crack which is <br /> more thsn one-sixteenth (1-16) of an inch wide at its widest point. <br /> ($) Lumps, blisters or flakes on the interior surface of a pipe or special. <br /> (4) Two or more breaks in the socket or spigot, unless they can be placed in the <br /> upper hal{ of the sewer. <br /> (5) When the bore or socket of the pipe varies /rom a true circle more than three <br /> (3) per cent of its nominal diameter. <br /> (6) When a pipe or special designed to be straight exhlbii~ a deviation from a straight <br /> llne of more than three-eights (~) of Im inch. <br /> (?) A piece broken from the spigot end deeller tha, the socket or longer lhan <br /> third of the diameter ot the pipe. <br /> (8) A piece broken from the bell end, if the fracture extends into the body of the <br /> pipe, or is Iongnr than one-Shied of the diameter of the pipe. <br /> · I be furnished with each branch pipe and consist o! n disk of <br /> (1) CAPS. Ca. lm ~.ha !./~ ~ an inch thick, fitting snugly into the socket of the branch <br /> vltri~ed clay, three.sourms <br /> <br /> (j) TESTS. The tests for vitri£ed clay pipe shall include the folinwing: 1. ~d Bearing Cruchin~ Test. <br /> 2. Hydrostatic Preesu~ <br /> <br /> <br />