H- Section

A steel member with a cross section in the shape of an “H”.

Hair Pin

V shaped reinforcing steel used to transfer anchor bolt shear to the concrete floor mass.

Hand-Geared (Crane)

A crane in which the bridge, hoist, or trolley is operated by the manual use of chain and gear without electric power.

Haunch

The deepened portion of a column or rafter designed to accommodate the higher bending moments at such points. (Usually occurs at the intersection of column and rafter.)

Haunch Brace

A diagonal member from the intersection of the column and rafter section of the rigid frame to the eave member to prevent lateral buckling of the haunch. 

Header

The horizontal framing member located at the top of a framed opening.

High Strength Bolts

Any bolt made from steel having a tensile strength in excess of 100,000 pounds per square inch.

High Strength Steel

Structural steel having a yield stress in excess of 36,000 pounds per square inch.

Hinged Base

See “Pinned Base”.

Hip

The line formed at the intersection of two adjacent sloping planes of a roof.

Hip Roof

A roof which is formed by sloping planes from all four sides.

Hoist

A mechanical lifting device usually attached to a trolley which travels along a bridge, monorail or jib crane. May be chain or electric operated.

Horizontal Guide Rollers

Wheels mounted near the ends of end trucks which roll on the side of the rail to restrict lateral movement of the crane.

Hot-Rolled Shapes

Steel sections (angles, channels, S-shapes, W-shapes, etc.) which are formed by rolling mills while the steel is in a semi-molten state.