Logging Terms  - H -

HANG-UP: Situation in which a tree is lodged in another and prevented from falling to the ground. Results from a number of causes such as improper facing and/or backcutting and wind. Can be very dangerous.

HAULBACK: A line used to pull the buttrigging and mainline to the logs to be yarded.

HAULBACK BLOCK: Any block the haulback line passes through including the corner block and tailblock.

HAYRACK: A type of loading boom where two tongs are used and logs are suspended. A transporting vehicle with multiple sets of bunks attached to a rigid frame usually used for hauling logs.

HAZARDOUS FALLING AREA: The area within a circle centered on the tree being felled and having a radius not less than twice the height of that tree.

HEAD LEAN: One of the two natural leaning forces found in most trees. Head lean is the most prominent outward slant or lean of a tree in reference to its base.

HEAD TREE: The tree where yarding and/or loading takes place. 

HEALTH CARE PROVIDER: A health care practitioner operating within the scope of his/her license, certificate, registration or legally authorized practice.

HEEL BOOM: A type of loading boom where one tong is used and one end of the log is pulled up against the boom.

HIGH LEAD: A system of logging wherein the main line is threaded through the main line block, which is attached near the top of the spar, to obtain a lift of the logs being yarded.

HOBO LOG and/or HITCHHIKERM.: A free or unattached log that is picked up by a turn and is transported with the turn.

HOLDING WOOD: Section of wood located between the face and the backcut. Its purpose is to prevent the tree from separating from the stump until it has been committed to the face. It also helps direct where the tree will fall. The holding wood must never be completely sawn off.

HOOKTENDER: The worker that supervises the method of moving the logs from the woods to the landing.

HORIZONTAL FACE CUT: First of the two cuts required to face a tree. Its depth is minimally 1/3 the diameter of the tree and level.

HUMBOLDT FACE: One of the two types of faces commonly used to fall a tree. The face section is removed from the stump of the tree.

HYDRAULIC JACK: A mechanical device, powered by internal pressure, used to control the direction in which a tree is to be felled.

HYDRAULIC JACK PAD: Thick steel pad which is placed between the hydraulic jack plunger and butt of the tree to distribute the upward push over a larger area.

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