Need advise sizing M&T joints for a bed - Printable Version +- Woodnet Forums (https://www.forums.woodnet.net) +-- Thread: Need advise sizing M&T joints for a bed (/showthread.php?tid=7351247) Pages:
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Need advise sizing M&T joints for a bed - shoottmx - 11-14-2019 Building a king size bed following this design except that the footboard rail will be straight across where the black line is drawn: [attachment=21745] Going to use these to connect the side rails to the head & foot board: [attachment=21746] Following the dimensions on Vermont Shaker's web site, all 4 rails are 1 1/4"x 6" cherry. The legs are 1 3/4 x 1 3/4" cherry. Their info says the rails are tenoned into the legs but no size is given. What tenon size should I use on the head & foot rails? I was thinking 3/4x 1-1/4 x 5 1/2". That leaves 1/2" of material on each side of the leg and 1/2" at the end of the tenon. Would a narrower tenon be better? Or thinner? Should I use West epoxy for maximum strength? Or TBlll? The screws for the side rail connectors will have to go thru the tenon. Planning to use #10 x 1-1/2". Does that sound ok? Advise appreciated! g RE: Need advise sizing M&T joints for a bed - Willyou - 11-14-2019 Your concern would be the width of the cheek side of the mortise. Your proposed dimensions will leave 1/2" here and I think that is good. My gut wonders if it would be better to make two 2 1/2" M&Ts with 1/2" in between. This would leave 1/4" shoulder at the tenon ends which is more than enough. I think that this would maintain some strength in the mortise walls that might be lost by a 5 1/2" long one. RE: Need advise sizing M&T joints for a bed - shoottmx - 11-14-2019 Thanks Willyou. Appreciate you pointing out the error on the mortise cheek dimension, I'll edit my post. I like the thought of two 2 1/2" tenons. Thank you for your advise. g RE: Need advise sizing M&T joints for a bed - Willyou - 11-14-2019 (11-14-2019, 06:25 PM)shoottmx Wrote: Thanks Willyou. Appreciate you pointing out the error on the mortise cheek dimension, I'll edit my post. I like the thought of two 2 1/2" tenons. Thank you for your advise. I think what you said was correct. I was just repeating it. RE: Need advise sizing M&T joints for a bed - shoottmx - 11-14-2019 (11-14-2019, 07:51 PM)Willyou Wrote: I think what you said was correct. I was just repeating it. My original post had "That leaves 1/4" of material on each side of the leg ". I edited the text after your post. Thanks again, g RE: Need advise sizing M&T joints for a bed - Admiral - 11-14-2019 (11-14-2019, 06:13 PM)Willyou Wrote: Your concern would be the width of the cheek side of the mortise. Your proposed dimensions will leave 1/2" here and I think that is good. My gut wonders if it would be better to make two 2 1/2" M&Ts with 1/2" in between. This would leave 1/4" shoulder at the tenon ends which is more than enough. I think that this would maintain some strength in the mortise walls that might be lost by a 5 1/2" long one. Agree with the double tenon/mortise; that adds significant strength (as I assume the bed will get some lateral stresses on a regular basis... ) . RE: Need advise sizing M&T joints for a bed - mike4244 - 11-14-2019 (11-14-2019, 03:02 PM)shoottmx Wrote: Building a king size bed following this design except that the footboard rail will be straight across where the black line is drawn: RE: Need advise sizing M&T joints for a bed - shoottmx - 11-15-2019 (11-14-2019, 08:24 PM)Admiral Wrote: Agree with the double tenon/mortise; that adds significant strength (as I assume the bed will get some lateral stresses on a regular basis... g RE: Need advise sizing M&T joints for a bed - shoottmx - 11-15-2019 Mike, Thank you for the detailed explanation. Amazing to me that by draw pinning the joint it can be done without glue. Do you use a dowel made of any wood or something specific? Oak maybe? I'm inclined to give pinning a try but with glue. I think the round plugs would be my choice. Thank you again for your information, g RE: Need advise sizing M&T joints for a bed - mike4244 - 11-16-2019 (11-15-2019, 08:37 PM)shoottmx Wrote: Mike, I generally use the same wood as the rails. Sometimes a completely different dowel is used for contrast. It does not make a difference which wood the dowel is made from. English bodgers ( chair maker) often carved a pin fairly round . mike |