Скачать или смотреть Studio Construction - Day 27 - Top Plate Marking

Very nice weather, started with a bit of a clean-up. Organised all the scrap into piles of like-material and lengths, swept up all the stray nails, etc.

Marked north and south top plates for rafters and loft joists.

The loft floor beam wasn't very flat and the bearing for the mid-span joist header was kinda terrible, so I cleaned that up with the circular saw and power planer. I love the planer, don't know how I lived without one before. In general, all the cordless power tools have been wonderful. I've standardised on DeWalt so I can share batteries, with the exception of the Ryobi post hole digger and Senco screw gun for which DeWalt doesn't really have an equivalent. Doing this without power tools would have been very tedious. Sure the nailers are flywheel-based and a bit heavier, slower and less powerful than pneumatic units, but there is no damn hose to deal with and we are nailing Douglas-fir here, not iron wood!

That said, in the process of roughing down the beam with the circular saw I managed to cook both of my 10 amp-hr DeWalt batteries: The internal wiring got so hot in one it melted the casing at each end of the pack string. The other just stopped working; the gauge no longer shows anything and it refuses to charge. I assume I just opened an internal fuse on that one? The other appears to be mostly cosmetically damaged but otherwise is still functional. My guess is the lower internal impedance of these large batteries (more cells in parallel?) means they can deliver enough current to be self-destructive where the smaller, say 6 A.hr batteries will under voltage cut-out before they melt themselves. I wasn't really bogging the saw down either, it was rubbing a bit - kinda unavoidable in this particular awkward sideways 8-ft up on a ladder cut - only enough to burn a spot or two on the wood slightly, but not trigger the saw's protection hardware. I think I'll contact their support about a replacement for the totally dead battery - and maybe the melted one too. If they won't honor it I'll just repair them myself. I think the 6 A.hr batteries are a better overall price/performance option, but I do love being able to cut framing timbers pretty much all day on a single charge with the 10 A.hr ones.

Next step is to install the loft floor joists, then the subfloor, and on to the gable framing, ridge beam posts, the ridge beam and then the rafters and gable overhang ladders. I will place a temporary work platform for the east gable framing and ridge beam install.