Hair Pin

Reinforcement bars used in distributing forces from the column foundation to the floor slab.

Handrails

Horizontal and vertical pipes fixed to stair stringers, edges of mezzanine floors, openings in floors and platform walkways.

Hangar Door

A large multi-leaf door that is used in aircraft hangars or similar buildings.

Haunch

Intersection of the column and rafter. Also referred to as Knee.

Header

A horizontal member over an opening in a wall.

High Strength Bolt

Any bolt made from steel having a tensile strength in excess of 690 Mega Pascal (MPa). Some examples are: ASTM A325, A354, A449 and A490.

Hillside Washer

A washer having non-parallel faces normally used on brace cables or rods. Also known as Bevel Washer.

Hinged Base

See Pinned Base.

Hoist

A lifting device that is mechanically, electrically or manually operated.

Horizontal Knee Splice

Horizontal connection of the column to the rafter.

Hot Rolled Shapes

Steel sections (angles, channels, I-sections, etc.), which are formed, while in a semi-molten state at the steel mill, into a shape having standard dimensions and properties specified by relevant standard specifications.