Purpose Numeracy: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
|||
| Line 5: | Line 5: | ||
*PSI of rock - 5000 | *PSI of rock - 5000 | ||
=Exercises= | =Exercises in Structural Design With Wood= | ||
State your assumptions. The answer follows. | State your assumptions. The answer follows. | ||
Revision as of 22:19, 12 July 2025
Basics
- PSI of wood - 1000
- PSI of steel -50000
- PSI of plastic - 5000
- PSI of rock - 5000
Exercises in Structural Design With Wood
State your assumptions. The answer follows.
- Calculate pullout force of a nail in wood
- How deep would a nail have to be driven into wood to break before pulling out?
- Calculate pullout force of deck screw per inch.
- When you reinforce 2x4 lumber at a joint with a 2 foot piece, how many deck screws would you need to use at the joint so that breakage of wood happens before pullout of screws?