Machine Bolts

Mild steel bolts conforming to ASTM A307 standard specifications.

Mastic

See Caulking.

Mezzanine

An intermediate floor within a building above the ground floor that occupies all or part of the building floor area and consists of columns, beams, joists, deck panels and edge trims to receive reinforced concrete.

Masonry

Construction materials such as bricks, concrete blocks and stone.

Moment

The tendency of a force to cause rotation about a point or axis.

Moment Connection

A connection designed to transfer moment, as well as axial and shear forces, between connecting members.

Monorail Beam

A single beam support for a material handling system. It is normally a hot rolled "I" beam.

Mono-Slope

A building sloped in one direction.

Mullion

A vertical bar or pier between panes or sections of windows and screens.

Multi-Gable Buildings

Buildings consisting of one or more gables across the width of the building.

Multi-Span Buildings

Buildings with interior columns.