Log Construction

(1)Logs that are sound and free of fractures may be used for foundations, beams, posts and similar members, provided it can be shown by a structural analysis or tests or previous experience that the strength of the member is adequate for its intended purposes.

(1)The portion of any log coming in contact with masonry or concrete at or below grade shall be treated with a wood preservative to prevent decay.

(1)All exterior joints between logs shall be rendered water-tight by methods such as machined joints, oakum packing, cement parging, chinking, caulking or a combination of these.

(1)Walls may be built of natural or manufactured logs.

(1)Walls made of logs in a horizontal position shall have interlocking intersections that will prevent the collection of water in the joints, or the horizontal logs shall butt to a vertical corner post to which the horizontal logs shall be firmly attached.

(1)Each log in a horizontal position shall be scribed as close as possible to its bearer and fastened to the bearer in at least three places throughout its length, by dowels, continuous machined joints, vertical framing members or interlocking intersections or any combination of these, but in no case shall the distance between fastenings exceed 1 800 mm.

(1)Each log in a wall built of vertical logs shall be scribed to fit as closely as possible to the adjacent logs.

(1)Logs used in a vertical position shall have a plate at the top and a plate at the bottom and the plates shall be at least as wide as the largest end diameter of any of the logs.

(1)Logs placed in vertical position shall be supported over window and door openings by lintels meeting the requirements of Tables 9.23.4.2.-L and 9.23.12.3.-A to 9.23.12.3.-D.

(1)At every opening in a wall made of logs in a horizontal position where shrinkage can occur there shall be a clearance between the rough buck header and the lintel log of not less than 13 mm in width for each 300 mm of height to allow for settlement.