Here are the physical, mechanical and design properties of cypress and how they compare to Western Red Cedar, which is used in many of the same applications.
Cypress |
West. Red Cedar |
|
Specific Gravity |
.46 |
.32 |
Density (lbs/ft cubed) |
31.4 |
22.4 |
Static Bending-Dry Lumber | ||
Modulus of rupture (lbs/in squared) |
10,600 |
7,500 |
Modulus of elasticity (millions lbs/in squared) |
1.44 |
1.11 |
Work to maximum load (in-lbs/ft cubed) |
8.2 |
5.8 |
Impact Bending-Dry Lumber | ||
Height of drop causing failure (in) |
24 |
17 |
Compression parallel to grain-Dry Lumber | ||
Maximum crushing strength (lbs/in squared) |
6,360 |
4,560 |
Compression perpendicular to grain-Dry Lumber | ||
Fiber stress at proportional limit (lbs/in squared) |
730 |
460 |
Tension perpendicular to the grain-Dry Lumber | ||
Maximum tensile strength (lbs/in squared) |
270 |
220 |
Shear parallel to grain-Dry Lumber | ||
Maximum shearing strength (lbs/in squared) |
1000 |
990 |
Side Hardness (lbs) |
510 |
350 |
Flame Spread Rating |
145-150 |
70 |