Alex Reid
Member
- Messages
- 739
- Location
- Zushi, Japan
I was thinking recently about joint stregth and took a look at FWW to see what they had to say. I found the following test and poll.
Here are the results from a Fine Woodworking test on joint strength using a hydraulic press. The press stress tested for racking on a 90 degree joint constructed of 3/4 thick x 2.5 wide x 8 long inch cherry stock. Placing the stock on an end-to-end diagonal and applying vertical force down to the breaking point of the joint.
1. HALF LAP 1,603 lb.
2. BRIDLE 1,560 lb.
3. SPLINED MITER 1,498 lb.
4. 3⁄8-IN. MORTISE & TENON 1,444 lb.
5. 3⁄8-IN. FLOATING M&T 1,396 lb.
6. MITER 1,374 lb.
7. 3⁄8-IN. WEDGED M&T 1,210 lb.
8. 3⁄8-IN. PINNED M&T 1,162 lb.
9. 5⁄16-IN. M&T 988 lb.
10. BEADLOCK 836 lb.
11. DOWEL 759 lb.
12. ¼ -IN. M&T 717 lb.
13. POCKET SCREW 698 lb.
14. DOMINO 597 lb.
15. BISCUIT 545 lb.
16. BUTT 473 lb.
17. COPE & STICK 313 lb.
18. STUB TENON 200 lb.
And here are the results of a readers poll in FWW forum Knots on the the strongest joint
1. M&T
2. Half Lap
3. Bridle
4. Pocket Screws
5. Floating tenon
6. Other
7. Miter
Here are the results from a Fine Woodworking test on joint strength using a hydraulic press. The press stress tested for racking on a 90 degree joint constructed of 3/4 thick x 2.5 wide x 8 long inch cherry stock. Placing the stock on an end-to-end diagonal and applying vertical force down to the breaking point of the joint.
1. HALF LAP 1,603 lb.
2. BRIDLE 1,560 lb.
3. SPLINED MITER 1,498 lb.
4. 3⁄8-IN. MORTISE & TENON 1,444 lb.
5. 3⁄8-IN. FLOATING M&T 1,396 lb.
6. MITER 1,374 lb.
7. 3⁄8-IN. WEDGED M&T 1,210 lb.
8. 3⁄8-IN. PINNED M&T 1,162 lb.
9. 5⁄16-IN. M&T 988 lb.
10. BEADLOCK 836 lb.
11. DOWEL 759 lb.
12. ¼ -IN. M&T 717 lb.
13. POCKET SCREW 698 lb.
14. DOMINO 597 lb.
15. BISCUIT 545 lb.
16. BUTT 473 lb.
17. COPE & STICK 313 lb.
18. STUB TENON 200 lb.
And here are the results of a readers poll in FWW forum Knots on the the strongest joint
1. M&T
2. Half Lap
3. Bridle
4. Pocket Screws
5. Floating tenon
6. Other
7. Miter