All I can think is that everyone is in such a hurry to..... I don't even know. To stack those 2x12s would probably take 2 people and some time to line up perfectly...... all to make 1 quick cut. Probably could've marked and cut them all individually in the same amount of man hours. Plus I can't believe that chain puts an equal amount of load on the saw motor as a traditional saw blade. Cool idea, I suppose, just not something I'd see myself using.
I noticed when he cut the boards, he slid the blade into an already started cut. Wonder if it is tough to get the saw started in the wood to make a straight cut. I will also agree, for heavy timbers it may be better.
Those have been around for years. Used in the timber framing industry. Never have used one. How does the chain get oiled?
They have been around at least 30 years. Prazzi beam cutter makes square end cuts in large timber. Maybe take a look at chain mortisers.
Years ago I used a similar setup for cutting huge glulam beams. We had a coffee can half full of 30 weight oil that we dipped the bar in between cuts. worked fine. We also had a 16" circular beam saw that we used on the purlins.
