• A LOG
is a solid building product at least 70mm thick, produced from pine or spruce and intended to be used primarily in wall structures.

• NOTCHED JOINTS
make a strong interlocking joint at log intersections.

• A SEAL RECESS
refers to the seam joining logs together.

• A SEAL
is packing inserted in the log seams to prevent draughts.

• DOWELLING
refers to the prevention of lateral movement of individual logs within a log wall.

• CRACKING
is the normal shrinkage that occurs when wood dries. During the drying process, the log develops radial cracks. Cracks can be guided by means of grooves cut into the log.

• SETTLING
refers to the sinking of a wall due to a load stress, drying shrinkage, or the compression of seams.

• THROUGH BOLTING
refers to a bolt, which extends the entire height of a wall and is located on the exterior part of a log intersection.

• A LOG BEAM
is a load-bearing beam formed from one or more logs, generally bolted together to form a strong beam.

• A TONGUED JAMB
facilitates attachment to the log wall of structures such as doors, windows or waterproof lining, which are not subject to settling. It inhibits lateral movement and allows for settling of the wall.

• SCREW JACK
Some components of a log building do not settle to the same extend as the log walls. The screw jack provides these components with both structural support and a means of correcting for the settling of the walls. The screw jack can be adjusted as settling progresses.