Study Program
Period
: S0673 / Building Construction II
: 2007
ROOF CONSTRUCTION
Meeting 9
Learning Outcome
By the end of this meeting, expected student will
be able to :
• Student can explain construction cover of roof
along with materials and condition cover of roof.
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Outline Items :
•
•
•
•
Items 1
Items 2
Items 3
Items 4
: Construction roof general condition.
: Kinds of truss form and detail its extension.
: Kinds of roof form.
: Types conclusion of roof.
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Roof Construction
 General
Roof is part of building having double function :
a. Protector of building from rain and heat.
b. Adding the Beauty of building.
Condition which must fulfill :
1. Construction have to be sturdy, strength and made from
materials which hold up and not easy to destroy by
influence of weather, hot and rain.
2. Have to be compatible with its building form so that can
add the beauty of building.
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3. Inclination of roof bevel angle have to in such a manner
so that easy water emit a stream of.
4. Can give freshmen to its dweller.
Marginally roof construction divided to become two shares:
1. Truss construction
2. Roof cover
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 Truss Construction
To determine roof framework type, things which must be
paid attention :
1. Long and wide size measure of building.
2. Usage of building ( Store, building, house, warehouse,
sport building, etc )
3. Ichnograph room form.
4. Unfold and apart between truss.
5. Building location.
6. Type conclusion of its roof.
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Truss Construction materials made of wood, steel and earn
also made from formed reinforced concrete like roof
frame. Before chosen materials there are some matter
which need to be paid attention :
 Truss made of wood :
 Durability
 Size measure limited
 Easy wood moulder to be eaten by white ants.
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 Truss made of steel :
 Melt when fire happened.
 Corrosion easily
 Heavily compared to with wood.
 Truss made of concrete :
 Heavily
 Have to be calculated correctly.
 Usually do not in form of easel frame, but like log.
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Kinds Roof Form :
1.
2.
3.
4.
5.
6.
Roof Saddle.
Roof Shield.
Roof Saw.
Roof of Joglo.
Roof Tend
Roof of Jengki, etc.
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 Truss Part :
a. Easel Foot
Forming inclination of
roof and as receiver all
burden above him. As
situating of it can be put
down
above
column
(wood/concrete) or brick
wall.
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b. Log Easel / Interesting
Log.
Caused by style of
horizontal, hence easel
feet will shift exit. Hence
to
avoid
style
of
horizontal the attached a
easel log or interesting
log.
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c. Log Hang / Middleman.
Because unfolding wide
easel, hence easel log
will
flex
downwards,
hence given by Hanging
log.
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d. Log Contributor (Skoor)
Effect
unfold
easel
progressively
length,
easel foot also more and
more length. As a result
also will flex and to
avoiding
it
given
contributor log or skoor.
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e. Nipper log.
functioning Nipper log so that easel construction not flex
forwards or rear.
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Progressively long unfold easel, its complicated
construction progressively, meaning more and more
contributor bars and bar its. When made easel of wood,
hence dimension of each bar will become big and also
will progressively heavily and inefficient again. So that in
a moment unfold certain more efficient if made easel of
steel or iron.
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• Example of convergent easel at concrete column or wall :
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Example of easel converging above wood pole :
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