harr

A harr is the vertical post or stile of a gate frame that carries the hinges. It is fixed in position while the gate leaf swings against it, and it must be sturdy enough to support the full weight and movement of the gate under repeated use. The harr is typically the thicker or more robustly constructed of the two main vertical members in a gate frame.

In timber gate construction, the harr is usually mortised to receive the hinge plates or hinge pintles. The hinges themselves are let into the face of the harr so that they sit flush or nearly flush with the wood surface. The depth and spacing of these mortises must be accurate, since misalignment causes binding, uneven swing, or rapid wear of the hinge hardware. The harr stands on the hanging side of the gate, opposite the latch post or closing stile.

Load and timber choice

The harr takes the full dead load of the gate plus all dynamic stress from opening and closing. For field gates and farm structures, the harr is often made from oak, elm, or other dense hardwood; for lighter domestic gates, softwoods like pine or fir are acceptable if the cross-section is adequate. The harr must also resist splitting at the hinge mortises, especially if it is narrow relative to the gate width. Wood movement (swelling and shrinking with moisture) can open and close the hinge mortises slightly, which is why traditional harrs are often left with a slightly proud grain or fitted with draw-pinned joints at the frame corners.

The term harr derives from old English and Scandinavian roots meaning a hinge pin or pivot point. In some regions and periods, particularly in Scotland and northern England, the same member is called a hinging post or hanging stile. Modern manufactured gates may use steel frames instead of timber, but the principle remains: the harr equivalent is the vertical member that mounts the hinges and remains stationary.

Failure of a harr typically shows as sagging or dropping of the gate, caused by wood decay near the hinges, splitting along the grain from hinge mortise stress, or movement at the frame joint where the harr meets the top rail. Preventive maintenance includes keeping the harr well-painted or sealed to ward off moisture penetration, checking hinge bolts for tightness, and avoiding gates that are excessively heavy for their construction.