POST AND LINTELx

ovariesracialUrban and Civil

Nov 25, 2013 (3 years and 4 months ago)

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Introduction

Definition

History

Post

Bean

Span Material Relations

Cantilever Beans

Failures

Conclusion



Is a simple construction method
using a

lintel,

header,
or

architrave

as the horizontal
member over a building void
supported at its ends by two
vertical

columns,

pillars, or

posts.
This architectural system and
building method has been
commonly used for centuries to
support the weight of the
structure located above the
openings created by windows
and doors in a

bearing wall.


From prehistoric times to the Roman Empire, the post


and


lintel system


was the root of architectural design. The interiors of
Egyptian temples and the


exteriors of Greek temples are delineated by columns
covered by stone lintels. The


Greeks opened their interior spaces by substituting
wooden beams for stone, since the


wood required fewer supports. The development of
the arch and vault challenged the


system but could not diminish its importance either in
masonry construction or in


wood framing, by its nature dependent on posts and
beams

The job of the post is to support the lintel and its loads without
crushing or buckling. Failure occurs, as in lintels, from excessive
weakness or length, but the difference is that the material must be
especially strong in compression. Stone, which has this property,
is more versatile as a post than as a lintel; under heavy loads it is
superior to wood but not to iron, steel, or reinforced concrete.
Masonry post, including those of brick, may be highly efficient,
since the loads compress the joints and add to their
cohesiveness. Although monolithic stone columns are used, they
are extravagant to produce for large structures, and columns are
usually built up of a series of cylindrical blocks called drums.

-
The

job

of
the

beam

or

lintel
is

to

bear

loads

that

rest

on

it
,
also

includes

its

own

wheigth
.


-
The

beam

has
to

be

able

to

do
this

without

deformor

break


load

BEAM
or

LINTEL

Failure

occurs

when

the

material
is

to

weak

or

the

span

is

to

long

to

support

the

load.

This

makes

the

beam

bend

or

break.

This

aspect

combined

with

others

can cause
many

structural

accidents
,
destroying

the

structure

like

a
house

of
cards

-
Form

prehistoric

times,
the

post and
lintel


System

has
been

used

for

all

kinds

of

structures
.

-
Since

the

Roman

and
Egiptian

temples
to

the

evolution

of
frames

and
archs
,
the

post

and lintel

system

has
remained

as
the

basic

idea.


-
Even

now

modern

buildings

use a
basic

post

And

lintel
system

idea.
The

engineers

had

c
ombined

these

two

elements

to

create

a

mushroom

columns
.

This

is

column

that

has a
slab

at
the

end

making

it

a
column

with

support

fuction

it

can

become

the

ceiling

of a
structure
.