Today’s progress involved only a lumber purchase.
I’d been contemplating which grade of plywood to use. Michalak’s book says luan or BCX is acceptable, ACX is his preference. I had been thinking of using marine for longevity, and eventually found it locally at an honest-to-goodness old-fashioned lumber yard. There was little besides luan and BCX at Lowes and Home Depot.
At the lumberyard, quarter-inch marine was $47/sheet vs. $25.25 for ACX. But the marine sure did look better, no voids and two A-finished sides. In the end, though, I chose ACX and bought three 1/4-inch sheets. These will be used for the hull’s sides and decks. I’ll buy the two 1/2″ sheets when the bottom goes on the boat.
“So what’s with the acronyms?” – Glad you asked. Plywood comes in various grades and is manufactured using different wood species and glues according to purpose. Each side of the sheet is assigned a grade of A, B, C, or D, where A is near perfect and D is, well, not pretty. Exterior grades also get an “X”. The ACX I bought is Douglas Fir, which is higher quality than pine. The C faces have holes from knots. These will require filling and fairing when the hull is built. Plywood grading is further explained here. And here.
There it is . . . everything you always wanted to know about the fascinating world of plywood, but were afraid to ask. 🙂
Otherwise, no work on the boat today. I had other commitments and Tropical Storm (?) Sandy is heading our way tomorrow. ‘Nuf said.