LIGHTWEIGHT CONSTRUCTION. LIGHTWEIGHT CONSTRUCTION. LIGHTWEIGHT CONSTRUCTION. PROGRAM OBJECTIVES: — Recognize lightweight construction — Identify the dangers of lightweight construction — Describe techniques of ventilating light- weight construction. LIGHTWEIGHT CONSTRUCTION.
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— Recognize lightweight construction
— Identify the dangers of lightweight
— Describe techniques of ventilating light-
Conventional construction utilizes structural members that depend on size for strength. The greater the span for a structural member the larger it has to be to support a given load.
Lightweight construction does not derive its strength from size. Is obtained from multiple members that are in compression and tension.
Additionally, the strength of the individual structural member is dependent on the sum total of the other members; thus, if one member fails, other members may fail.
Preplanning - Your district
Walk around structure sizing up old/new
construction methods and,
determine strengths and hazards by
undressing the building in your mind
Search and Rescue
etc...LIGHTWEIGHT CONSTRUCTIONPLAN: Strategy and Tactics
Structures constructed in the last 20 years
2x4-inch rafter tails under the eaves
Concrete tilt-up walls
Fascias or “new style” buildings
Buildings constructed in the last 20 yearsLIGHTWEIGHT CONSTRUCTIONINDICATORS
— Lightweight Beams
— Wood Trusses
— Metal Trusses
KEY POINTS CONT’D: