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.