46 DEPARTMENT BULLETIN 1216, U. S. DEPT. OF AGRICULTURE 
STANDARDIZATION DATA 
Weight of charge (after standardization) 
Condition 
of locknuts 
on staves 
Condition of 
scales 
Number and 
position of 
fresh stave 
liners 
Repairs (note 
any repairs 
affecting the 
condition of 
the barrel) 
10 large spheres 
Small spheres 
Total 
Number of charges tested since last inspection 
RUNNING DATA 
Time readings 
Revolution 
counter 
readings 
Running 
notes, 
stops, etc. 
Hours 
Minutes 
Seconds 
:::::::::::: 
""" 'T 
WEIGHTS AND CALCULATIONS 
Initial weight of 10 brick 
Final weight of 10 brick 
Loss in weight 
Percentage loss 
Correction differential 
Corrected percentage of loss. 
Percentage loss 
1 The calculation must appear. 
Number of broken brick and remarks on same 
I certify that the foregoing test was made in accordance with the methods of testing of the American 
Society for Testing Materials and is a true record. 
Signature of tester: 
Date Location of laboratory 
Owner 
Serial No. 
33. METHOD OF TESTING CAST IRON, CONCRETE, AND 
VITRIFIED CLAY CULVERT PIPE 
STRENGTH TESTS 27 
1. In making strength tests either the three-edge bearing method or the sand- 
bearing method may be used. 
2. When tested by the three-edge bearing method (figs. 15 and 16), a ma- 
chine shall be used which gives a uniform deflection throughout the full length 
of the pipe. The lower bearing for the pipe shall consist of two wooden strins 
with vertical sides having their interior top corners rounded to a radius of 
approximately one-half inch. The strips shall be straight and shall be securely 
fastened to a rigid block with the interior vertical sides spaced a distance apart 
not less than one-half inch nor more than 1 inch for each foot of diameter of 
pipe. The upper bearing shall be a rigid wooden block, straight and true 
from end to end. The upper and lower bearings shall extend the full length of 
pipe exclusive of bell. The pipe shall be placed symmetrically between the two 
bearings as illustrated in Figures 15 and 16. 
37 Methods recommended by the joint concrete culvert pipe committee in its report of 
February, 1U20 (12). 
