The ECM of every species of wood is different. It all mathematical, (plug in the % of change x the DCM # assigned to that species of wood) x the width of the board = the dime...
Replies 21Applied industry standard, NWFA Installation Guidelines Section 1, Chapter 1, Part 1 #7 states: "Crawl space should be a minimum of 18" from ground to underside of joists". ...
Replies 23Dudefloor, check the math. The dimensional change coefficient of red oak is .00369. Calculation: 3 x .00369 = .01107 x 5 = .055 per board over 10' or 24 boards will be 1.3284...
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