|-----------------------------------------------------------------------------------------------------------------------------------------------| | TABLE XXI TABLE XXI | |-----------------------------------------------------------------------------------------------------------------------------------------------| | COMPRESSION AND SHEAR TESTS ON AIR-SEASONED MATERIAL | |-----------------------------------------------------------------------------------------------------------------------------------------------| | | Compression | Compression | Shear | | | parallel to grain | perpendicular to grain | | | |------------------------------------------------------+-------------------------------------------+--------------------------| | | | | | Cr. | | Cr. | | | | | Cr. | | | | | Species | | | Per | str. | M. of | str. | | | | Per | str. | | Per | | | | Size of | No. | cent | at | E. | at max. | Stress | | No. | cent | at max. | No. | cent | Shear | | | specimen | of | of | E. L. | per | ld.,. | area | Height | of | of | ld., | of | of | strength | | | | tests | mois- | per | square | per | | | tests | mois- | per | tests | mois- | | | | | | ture | square | inch | square | | | | ture | square | | ture | | | | | | | inch | | inch | | | | | inch | | | | |-----------------+----------+-------+-------+--------+--------+---------+--------+--------+-------+ ------+---------+-------+-------+----------| | | | | | | 1,000 | | | | | | | | | | | | Inches | | | Lbs. | lbs. | Lbs. | Inches | Inches | | | Lbs. | | | Lbs. | | | | | | | | | | | | | | | | | | Longleaf pine | 4 by 5 | 46 | 26.3 | 3,480 | | 4,800 | 4 by 5 | 4 | 22 | 25.1 | 572 | 52 | 20.2 | 984 |