Introduzione al piano Systems
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Module 7: Floor Systems

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Introduzione al piano Systems

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Floor Systems
Proper construction of floors is essential because, no matter how well the foundation of a building is constructed, a structure will not stand if the floors and sills are poorly assembled.

Terms Associated with Floor Systems
Crown
The high point of the crooked edge of a framing member.

Dead Load
The weight of permanent, stationary construction and equipment included in a building.

Firestop
An approved material used to fill air passages in a frame to retard the spread of fire.

Foundation
The supporting portion of a structure, including the footings.

Header Joist
A framing member used in platform framing into which the common joists are fitted, forming the box sill. Header joists are also used to support the free ends of joists when framing openings in a floor.

Joist Hanger
A metal stirrup secured to the face of a structural member, such as a girder, to support and align the ends of joists flush with the member.

Let-In
Any type of notch in a stud, joist, etc., which holds another piece. The item that is supported by the notch is said to be let-in.

Live Load
The total of all moving and variable loads that may be placed upon a building.

Pier
A column of masonry used to support other structural members, typically girders or beams.

Rafter Plate
The top or bottom horizontal member at the top of a wall.

Scab
A length of lumber applied over a joint to strengthen it.

Scarf
To join the ends of stock together with a sloping lap joint so there appears to be a single piece.

Soleplate
The bottom horizontal member of a wall frame.

Span
The distance between structural supports such as walls, columns, piers, beams, or girders.

Tail Joist
Short joists that run from an opening to a bearing.

Trimmer Joist
A full-length joist that reinforces a rough opening in the floor.

Truss
An engineered assembly made of wood or wood and metal members, used to support floors and roofs.

Underlayment
A material, such as particleboard or plywood, laid on top of the subfloor to provide a smoother surface for the finished flooring.

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