FRAMED STRUCTURE Members: *Daniela Rodriguez 09-10729 *Sofia Saturno 09-10796.
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Transcript of FRAMED STRUCTURE Members: *Daniela Rodriguez 09-10729 *Sofia Saturno 09-10796.
FRAMED STRUCTURE
A framed structure one that is made stable by a skeleton that is able to stand by itself without depending on floors or walls to
resist deformation.
Materials such as wood, steel, and reinforced concrete make
the best members for compression.
Masonry skeletons, which cannot be made rigid without
walls, are not frames.
FRAMED STRUCTURE
HISTORY
The heavy timber frame was the commonest type of
construction in eastern Asia and northern Europe.
It was supplanted by the American light wood frame
(balloon frame).
Construction is similar in the two systems, since they are both based on the post-and-
lintel principle.
FRAMED STRUCTURE
HOW IT WORKS
Posts must rest on a level usually composed of masonry or concrete.
Each upper story is laid on crossbeams that are supported on the exterior wall by its horizontal
members. Interior walls give additional beam support.
FRAMED STRUCTURETYPES OF FRAMES
In the HEAVY-TIMBER SYSTEM, the beams are strong enough to allow the upper story and roof to project beyond the plane of the
ground-floor posts, increasing the space and weather protection.
The LIGHT FRAME is sheathed with vertical or horizontal boarding or
shingling, which is jointed or overlapped for weather protection.
The light frame system has not been significantly improved since its
introduction, and it lags behind other modern techniques.
FRAMED STRUCTURE
NEW TECHNIQUES
Modern heavy-timber and
laminated-wood techniques
provide means of building up compound
members for trusses and
arches.
FRAMED STRUCTURESTEEL FRAMING
Based on the same principle but is much simplified by the far
greater strength of the material.
The load-bearing capacity of steel is adopted for buildings many times higher than those
made of other materials.
Because the column and beam are fused by riveting or welding, stresses are distributed between
them.
FRAMED STRUCTURESTEEL FRAMING
Since structural steel must be protected from corrosion, the
skeleton is covered or painted.
The steel frame is used also in single story buildings where large
spans are required.
Can cover systems employing arches, trusses, and other elements
in a limitless variety of forms in order to suit the functions of the
building.