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 |