54 DEPARTMENT BULLETIN 1216, U. S. DEPT. OF AGRICULTURE 
(C) FREEZING AND THAWING TESTS OF DRAIN TILE 
26. The test specimens employed in making the freezing and thawing test 
shall be another set selected as specified in section 21. 
h>- 
Trays 
partly 
Removed 
front Elevation. 
Side Elevation 
—2 Corner Strips, lg;"xgxt'5j>y 
Top View, 
Trays Removed. 
Notes: s „ Section A-A, 
Rack Cons+ructed of ■§■ x-g x ■§■ Trays Removed, 
Galvanized Angles, except as Noted. 
All Connections Riveted or Sol- 
dered. 
Trays, l/'x/lx /£ outside, Made of 
No. 17 Galvanized Steel. 
Fig. 22. — Suggested plans for freezing crate and trays 
27. The specimens shall be dried as specified in section 22. 
28. The same scales and weights as are specified in section 23 for the absorp- 
tion test or others of equivalent sensitiveness and accuracy shall be employed 
