Balcony: An exterior floor that projects from the wall of a building, is completely supported by the building structure, and is enclosed by a parapet or railing.

Concentrated Load: The application of a relatively large force on a relatively small area.

Corner Post: A fence post punched on two adjacent sides or 90 degrees apart. It allows for a 90-degree corner.

Dead Load: The weight of the structure itself, which includes the plank system, support structure and any railings, built-in benches and other permanent features.

Deck: An exterior floor supported on at least two opposing sides by an adjacent structure, posts, piers or other independent supports.

End Post: A fence post that is punched on one side only. It is used as a terminal post or as the support post for a gate.

Exterior Walking Surface: Flooring designed to be used outdoors as a component of decks, docks, balconies and stairs.

Impact Modifiers: Ingredients in the vinyl formula that help to keep it from breaking in cold temperatures. In warm weather, the vinyl itself resists impacts. In cold weather, the impact modifiers help keep it somewhat flexible and extra strong.

Joist Spacing: The distance between the center of each joist, commonly 16" or 24". Joists spaced 16" on center are actually 14-1/2" apart.

Joists: The sub-deck structural elements located directly beneath the plank system.

Line Post: A fence post that is used in a straight line of fence. The rail either passes directly through the post or two rails connect in the post from the opposite sides.

Plank Rail: 1-1/2" x 5-1/2" board used as the horizontal part of the fence. Available 8' and 16' long.

Plank Support Span: The distance between plank support, including standard joist spacing and other support configurations such as angled joists.

Plank System: Deck planks and the accessories that mate the planks to sub-decking or other deck components. Plank systems include planks, fasteners, installation clips or clip systems, end caps and trim pieces.

Planks: The uppermost deck components that together comprise the walking surface.

Post Caps: Injection-molded tops for round and square posts. They fit inside the top of each post and molded ribs to provide a secure pressure-fit.

Rail Spacing: Distance between the rails on various styles of fence. In general, the more rails there are, the closer the spacing.

Round Post: 5" diameter round extruded post. Used with round rails or plank rails. Available in 4', 5-1/2', 7', 8', 9' lengths.

Structural Integrity: A structure's uncompromised ability to safely resist the required loads.

Sub Structure: The deck construction that is located below, and supports the plank system. Components include joists and hangers, ledgers, rim joists, beams, posts, anchors and footers.

Static Electricity: Static electricity is created when certain objects or materials are rubbed together. The result of the friction between the materials creates the static electricity.

Tribo-charging: Is an electrification of two materials subject to the effect of "tribo-charging" or "frictional charging", "contact/separation charging.". The further apart the materials are on the degree of separation list, the more pronounced the effect. The list can be found under the National Fire Protection Association, Inc. (NFPA) 77, Static Electricity.

Ultraviolet Inhibitors: Ingredients in the vinyl formula that protect the vinyl from the damaging rays of the sun.

Wind Load: The lateral pressure on a structure in pounds per square foot (psf), due to wind blowing in any direction.