Roof frames provide the structural support for the roof of a
building. Different types of roof frames are used depending on architectural
style, building design, and regional construction practices. Here are some
common types of roof frames:
Common Roof Truss: This is one of the most widely used roof
framing systems. It consists of triangular-shaped trusses made of wooden or
metal members that provide support for the roof. Common trusses are versatile
and can be used in various roof designs.
King Post Truss: This truss features a vertical central post
(king post) that supports a horizontal tie beam. It is often used in
cathedral-style ceilings or for decorative purposes in timber-framed homes.
Queen Post Truss: Similar to the king post truss, the queen
post truss includes two vertical posts (queen posts) instead of one. This
design provides extra support for longer spans and is commonly used in larger
roofs.
Scissor Truss: Scissor trusses have an inverted V shape,
with the bottom chord sloping upwards. They are often used to create vaulted or
cathedral-style ceilings and provide an open, spacious interior.
Gambrel Truss: Gambrel trusses are commonly used in barns
and resemble the gambrel roof shape. They have two sloping sides with a steeper
lower slope and a shallower upper slope.
Howe Truss: The Howe truss features vertical posts with
diagonal members forming an X shape. It is a versatile design that is used in
various roof configurations, including gable and hip roofs.
Fan Truss: Fan trusses are characterized by radiating
members that fan out from a central hub. They are used in circular or polygonal
roof designs, such as in some churches or event venues.
Bowstring Truss: These trusses have a curved or arched upper
chord, creating a bowstring shape. They are often used in industrial buildings
and gymnasiums to achieve wide, open spaces without interior support columns.
Flat Roof Truss: Designed for flat or nearly flat roofs,
these trusses have a horizontal top chord and vertical web members to support
the roof structure.
Mansard Truss: Mansard trusses are designed to support
Mansard roofs, which have a double slope on all sides. These trusses are often
used to maximize attic space in residential buildings.
Parallel Chord Truss: Parallel chord trusses have two
parallel horizontal chords connected by diagonal web members. They are commonly
used in modern and industrial buildings.
Scissor Roof Truss: These trusses have two bottom chords
that intersect in an X shape, creating a scissor-like appearance. They are used
to create vaulted or cathedral-style ceilings with a central ridge.
Raised Heel Truss: Raised heel trusses have an elevated
bottom chord at the wall connection, allowing for additional insulation and
ventilation in the attic space. They are energy-efficient and commonly used in
residential construction.
The choice of roof frame depends on factors such as
architectural style, span requirements, building codes, and the desired
interior space and aesthetics of the structure.
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lapas, thatch houses and thatch roof construction
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