APPENDIX. 
METHOD FOR INSPECTING AND TESTING PAVING BRICK. 1 
The quality and acceptability of paving brick, in the absence of other special tests 
mutually agreed upon in advance by the seller on the one side and the buyer on the 
other side, shall be determined by the following procedure, viz: 
(1) The rattler test, for the purpose of determining whether the material as a whole 
possesses to a sufficient degree, strength, toughness, and hardness; 
(2) Visual inspection, for the purpose of determining whether the physical proper- 
ties of the material as to dimensions, accuracy and uniformity of shape and color are 
in general satisfactory, and for the purpose of culling out from the shipment individu- 
ally imperfect or unsatisfactory brick. 
The acceptance of paving bricks as satisfactorily meeting one of these tests shall not 
be construed as in any way waiving the other. 
SECTION I.-THE RATTLER TEST. 
THE SELECTION OF SAMPLES FOR TEST. 
Item 1. Place of sampling. — In general where a shipment of bricks involving a 
quantity of less than 100,000 is under consideration, the sampling may be done either 
at the brick factory prior to shipment, or on cars at their destination or on the street, 
when delivered ready for use. When the quantity under consideration exceeds 
100.000, the sampling shall be done at the factory prior to shipment. Bricks accepted 
as the result of tests prior to shipment shall not be liable to subsequent rejection as a 
whole, but are subject to such culling as is provided for under Section II (Visual 
inspection). 
Item 2. Method of selecting samples. — In general the buyer shall select his own 
samples from the material which the seller proposes to furnish. The seller shall have 
the right to be present during the selection of a sample. The sampler shall endeavor, 
to the best of his judgment, to select brick representing the average of the lot. No 
samples shall include bricks which would be rejected by visual inspection as provided 
in Section II, except that where controversy arises, whole tests may be selected to 
determine the admissibility of certain types or portions of the lot having a character- 
istic appearance in common. In cases where prolonged controversy occurs between 
buyer and seller and samples selected by each party fail to show reasonable concurrence, 
then both parties shall unite in the selection of a disinterested person to select the 
samples, and both parties shall be bound by the results of samples thus selected. 
Item 3. Number of samples per lot. — In general one sample of ten bricks shall be 
tested for every 10,000 bricks contained in the lot under consideration, but where the 
total quantity exceeds 100,000. the number of tests tested may be fewer than one per 
10,000, provided that they shall be distributed as uniformly as practicable over the 
entire lot. 
Item 4. Shipment of samples. — Samples which must be transported long distances 
by freight or express must be carefully put up in packages holding not more than 12 
bricks each. When more than six bricks are shipped in one package, it must be so ar- 
ranged as to carry two parallel rows of bricks side by side, and these rows must be 
separated by a partition. In event of some of the bricks being cracked or broken in 
transit, the sample shall be disqualified if there are not remaining ten sound undam- 
aged bricks. 
1 Recommended by subcommittee on paving brick of the American Society for Testing Materials. 
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