Stavebolts, Application, Design, and Tensile Strength
The Stavebolt is designed as a hidden tension connector for heavy timber. The connector is approximately 5-10 times stronger in tension applications than pinned mortise and tenon solutions. The device has been utilized successfully for a number of years by Building With Logs, Limited in the construction of various custom log and timber structures, including models of the Stavehouse Post and Beam System, as well as in heavy timber truss framing.

The Stavebolt device may be found to be most useful in applications where the performance value of the connection is critical, where project economics or engineering will not permit the use of traditional mortise and tenon and where designers opt for a more attractive alternative to the installation of exposed steel plates. The reported ductility of the device suggests that it will, where installed in appropriately designed frames, be well suited for use in structures built to resist hurricane force winds or seismic events. Manufacturing specifications have been developed to insure product quality throughout the fabrication process.

The installation does not require the same degree of craftsmanship commonly associated with traditional timber framing. The installation is performed by using augers and jigs to guide the drills. A detailed installation manual is included. Stavebolt Jig $2400.00 (2" x 16" Auger bit Now Included).

2 Pin Stavebolts Mounting Hardware (bolts) not included.
Bolt Lengths will vary with size of logs or timbers.
1-11 $54.00 ea.
12-49 $45.90 ea.
50-99 $43.20 ea.
100-199 $40.50 ea.
200+ $37.80 ea.

3 Pin Stavebolts Mounting Hardware (bolts) not included.
Bolt Lengths will vary with size of logs or timbers.
1-11 $62.65 ea.
12-49 $53.25 ea.
50-99 $50.12 ea.
100-199 $46.99 ea.
200+ $43.86 ea.
For More Technical Information, see the CCMC Report.
For the latest information, check out the StaveBolt Website.
Summary of Working Stress Design Values for the Stavebolt Allowable Tensile force (lb)
Species
2" Dia. Tie-Bolt Washer
3" Dia. Tie-Bolt Washer
4" Dia. Tie-Bolt Washer
Standard Term Load
Short Term Load
Standard Term Load
Short Term Load
Standard Term Load
Short Term Load
White Pine
(Northern Species)
730
840
1830
2100
3260
3750
Spruce-pine-fir
1110
1280
2770
3190
4940
5680
Spruce-pine Glulam
1220
1400
3040
3500
5410
8220
Douglas-fir sawn timber and Glulam
1470
1690
3660
4210
6530
7510
Notes:
1. For use with working stress design procedures. The values have been soft-converted from limited states design values using a live load to dead load ration of three.
2. Short term loading includes wind and earthquake loads.
3. Tabulated values are for dry service conditions with no fire retardant treatment.
4. The values are applicable for a stavebolt used in an 8x8 or larger member with the bolts bearing on a minimum of 76mm (3") of wood each side of pipe. Bolts to be SAE Grade 8.
5. 2" washer to be 5/32" thick, 3" washer to be 1/4" thick with 2 cut washers under nut.
6. For full details of the product and development design values see Quaile Engineering Ltd. report No. 98-092-1 dated September, 1998.