7/5/2023 0 Comments Ostiarius aeternamWhy are we still cutting birdsmouths in rafters? We now have power tools that can easily rip a continuous beveled strip that can be added to the top plate to attach the rafters. 28 et ego vitam ternam do eis, et non peribunt in ternum, et non rapiet eas. Plus, we have steel connectors to ensure the attachment.Ī. 3 Huic ostiarius aperit, et oves vocem ejus audiunt, et proprias oves. Mark McKenzie, an engineer in Brewster, Mass., responds: Although this alternative framing method could work in some instances, I think that the issues raised outweigh the benefits when compared with conventional (and properly executed) birdsmouth rafter cuts. To begin with, how well the rafter was attached would depend directly on how well the ripped strip was attached to the plate, which would require an engineered attachment schedule to ensure that the ripped strip stayed put. Huic ostiarius aperit et oues vocem eius audiunt. And my guess is that the narrow strip would most likely split when you tried to nail through it.Īnother problem with this method occurs when the rafters attach to the top of a wall instead of to a plate on the floor deck. Et ibunt hij in supplicium eternum, iusti autem in vitam eternam. In the Roman Catholic Church, this 'porter' became the lowest of the four minor orders prescribed by the Council of Trent. The angled strip on top of the wall plates would prevent the ceiling/attic joists from bearing properly on the top plate, and the strip itself would not provide adequate bearing for those joists. An ostiarius, a Latin word sometimes anglicized as ostiary but often literally translated as porter or doorman, originally was a servant or guard posted at the entrance of a building. Placing the joists on the strip above the plate would also make it more difficult to attach the top edge of the wallboard. Structurally, a rafter sitting on an angular bearing point (the inclined plane of the ripped strip) would require that the rafter-plate connection deal with the horizontal and vertical components of the force differently than with a birdsmouth. With the ripped strip installation, there would be no horizontal bearing surface to resist that force.Ī lot of force is transferred down the length of the rafter, and the seat cut on the birdsmouth transfers that force directly to the top plate. et ego cognosco eas, et sequuntur me : 28et ego vitam ternam do eis. Granted, a structural ridge can lessen the amount of force on a rafter - but even then, I would not attempt a ripped-strip rafter installation without having the entire system approved by an engineer. 3Huic ostiarius aperit, et oves vocem ejus audiunt, et proprias ovas vocat.
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