Chapter 26 SystemsBuilt Housing Objectives Describe the changes

Chapter 26 Systems-Built Housing

Objectives • Describe the changes that have taken place in the technology of systems-built housing. • Identify the variety of factory-built components that are utilized in a systems-built home. • List and differentiate between the basic types of systems-built structures. • Explain the erection sequence of a panelized home. • Define terms used in the systems-built housing industry. Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Prefabrication • Houses built from components assembled in factory • Also called systems-built housing • Units are shipped to site for final assembly and erection Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Modules • Factory-built housing also includes modules • Three-dimensional units are fully assembled before they leave plant • Designs are completed using computers • Quality control process ensures that work meets building codes Modular Genius Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Factory-Built Components • Used in building construction – – Roof trusses Floor trusses Walls Roof sections or panels • Prepared in factory and shipped to building sites Wausau Homes, Inc. Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Thinking Green • Selecting materials, cutting, and assembly are all done with aid of computers • Less waste is created • Fewer trips to jobsite are needed • This reduces waste in local landfills and emissions from truck traffic Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Types of Systems-Built Homes • Types of systems-built housing include – – – Concrete homes Modular homes Panelized homes Log homes Precut homes Manufactured homes • All offer lower costs and rapid construction Enercept, Inc. Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Concrete Homes • Concrete is becoming popular for basic structure of houses, including walls and roofs • Concrete homes can be more stable than wood-framed houses • Concrete offers reduced air infiltration and drafts • Insurance companies may offer lower premiums for fireresistant concrete homes Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Modular Homes • Made up of two or more three-dimensional units • Modules are produced in factory • May be single-story or two-story homes • Some modules are small or only one room Innovative Building Systems Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Advantages • Nearly all detailed finish work can be done at factory • Kitchen cabinets can be installed • Wall, floor, and ceiling surfaces can be finished • Electrical, heating/air conditioning, and plumbing can be installed Innovative Building Systems Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Panelized Homes • Leave factory as floor, wall, and roof panels • Closed panels are finished on inside and outside surfaces • Windows are in place • Studs for electrical wiring and plumbing runs are predrilled Wausau Homes, Inc. Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Construction • Flat sections of structure are built on assembly lines • Parts are fastened with pneumatic nailers • Electrical wiring may be installed • Roof units are prepared • Ceilings may be painted at factory Duo-Fast Corp. Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Precut Homes • • Lumber for home is cut, shaped, and labeled Then it is shipped to jobsite This reduces labor and saves time Manufacturers include materials needed to form outside and inside surfaces • Windows, doors, stairs, and cabinets may be provided Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Log Homes • Walls are built by stacking precut and machined logs on top of each other • Logs are combined with other materials to produce any style of home • High-speed machines mill logs to uniform shapes and lengths • Logs receive tongues, grooves, notches, and splines that hold them together Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Onsite Building Erection • Preparation begins at factory • Each unit is marked and placed on truck in order of assembly • Contractor prepares foundation for house according to given dimensions Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Setup Crews • Many systems-built manufacturers send their own setup crews • Crane is used to lift units from trailers • Units are set in place on foundation Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Assembling Panelized Homes • Typically, panelized structures are assembled onsite • Crane may be used to lift and move panels • Manufacturer provides detailed instructions for joining parts Insulspan Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Ceiling Panels • Can be attached to walls and ridge beams in two ways – Metal clips or ties – Roof spikes • Asphalt or fiberglass shingles can be applied directly over structural roof panels Enercept, Inc. ; Insulspan Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Manufactured Homes • Built as dwelling units of at least 320 square feet in size • Have permanent chassis to assure initial and continued transportability of home Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Production Methods • Like those used for standard factory-built housing, with some exceptions • Floor must be one rigid unit • Expandable feature permits wider living room • Home is finished and fully equipped at factory Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Set Up • Sections are separately towed to site and positioned to be joined • Manufactured homes do not need permanent foundation, although some have one • Utility hook-ups are ready to be made at site Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.

Construction Careers Equipment Operators • Operate bulldozers, graders, lifts, loaders, excavators, and cranes • Most work in building construction and highway maintenance • Learn skills from vocational programs, on-job training, or apprenticeships michaeljung/Shutterstock Copyright Goodheart-Willcox Co. , Inc. May not be posted to a publicly accessible website.