Originally Posted by MinConst
Unless you are clamping the pieces together first this is what you want to have happen. You don't say what part of the deck structure your using these 3" screws on so it is hard to say if they are correct for the application and if predrilling is needed.
Thank you for your reply. BTW I checked out your website and I thought it was informative and interesting.
To answer your question:
What I am doing is building a ramp for my dog. There is currently no way to do this that will comply with code. In Westchester County, NY no ramp may have a slope greater than 1:12 (12" of run for every 1" of rise). My deck is elevated, a little over 7 feet. This would require a ramp of over 85', which is just impossible. Also it's a ramp only for my dog.
So right now I have some pressure-treated 2x10x10's and also some 2x10x5's. I am going to take two 2x10x10's end to end. I will connect them together (sister) using the 2x10x5, so that 2 1/2 feet is on the first board and 2 1/2 feet is on the second board.
I can clamp together the pieces I guess? The ramp is going to be twenty feet at 1:3. 1:3 works for my dog.
Do you think I should predrill? The pressure treated wood has been sitting in my garage since the very beginning of this year. What do you think of 1/16 predrill? Too little?
I still haven't figured out how to connect the 20' ramp to the deck.