Study Program
Year
: S0673 / Building Construction II
: 2007
REINFORCED CONCRETE AND
IRON RESTATING.
Meeting 12
Learning Outcome
By the end of this meeting, expected student will
be able to :
• Student can explain made building construction
of concrete along with its picture.
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Outcome Items
•
•
•
•
Items 1
Items 2
Items 3
Items 4
: Common Term of reinforced concrete.
: Tables of concrete quality and class.
: Bone and is thick of concrete blanket.
: Execution of installation of restating.
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Construction Reinforced Concrete.
Terms :
• Concrete : obtained materials by mixing smooth
aggregate, harsh aggregate, water and cement.
• Reinforced concrete: concrete which consist of bone
bar and planned pursuant to ascription that both the
materials cooperate in shouldering styles.
• Prestressed concrete: reinforced concrete in which
have been generated by tensions of intern in such
division and value of aspect till tensions effect of burden
can be neutralized until an wanted level.
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• Preprint concrete: parts of reinforced concrete or
spineless which printed in dimiciling is other the than
dimiciling finally in construction.
• Light Concrete : concrete where its aggregate consist
of light materialss.
• Spineless concrete: concrete which do not contain
bone bar.
• Bone steel : steel type weared for the bone of concrete
which must fulfill certain rules.
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• Bar which is profile: bone bar with special surface form
to enlarge juxtaposition with concrete.
• Artless bar : bone bar with slippery surface and in form
of prismatis.
• Bone bundle : binding to consist of 2,3,4 or more bar
which is bound profile along with slivering, so that all
binding to work as one unity.
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Class and Quality Concrete
• Concrete for the
construction
of
reinforced concrete
divided into class
and quality like in
tables beside this :
Class
Quality
Goal
I
B
Non
II
B1
K-125
K-175
K-225
III
K > 225
Structural
Structural
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Bone
Barb and Bend.
full (of) Barb:
Artless Bar.
Bar which is profile.
d
= artless bar diameter.
dp
= diameter identification
of bar which profile.
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• Oblique barb:
Artless Bar
Bar which profile.
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Oblique Barb at
Chock.
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For bone also have to be paid attention :
• Length channeling of bone depress.
• Length channeling of interesting bone.
• length of overlap.
• Distance between bone bar.
• etc
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Parts of Construction
PLATE :
• Thick of plate may not be taken less than 7 cm for the plate of roof
and 12 cm for the plate of floor.
• Plate bone, including divisor bone may not be taken less than
needed to shoulder to dwindle and change of temperature. Wide of
bone have to be taken minimum 0,25 % from wide of existing
concrete.
• Wide bone divisor of minimum taken 20 % from wide fundamental
bone.
• Bone diameter for the plate of fundamental bone minimum  8 mm,
divisor bone  6 mm, when used soft steel and fundamental bone 
5 mm, divisor bone  4 mm 4 mm for hard steel.
• Plate which thicker than 25 cm have to be attached.
• plate in places of momen maximum fulcrums and maximum field
momen distance of[is each bone bar may not more than 20 cm or 2
thick times plate.
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Wall :
• Thick taken vertical wall minimum 1 / 30 from unfolding wall
cleanness or 12 cm for wall shouldering to flex and 10 cm for wall
which not shoulder to flex. External walls of subterranean room
minimum 20 cm.
• Installation of bone vertical wall thickly less than 12 cm, bone
attached in the middle of, while wall of reservoir water, and other
wall thickly >/ 30 cm have to be attached bone double.
• Wide minimum bone 0,25 % from wide existing concrete.
• Used bone diameter equal to plate bone.
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LOG :
• Wide minimum log body 1 / 30 times unfold cleanness.
High log have to as according to is wide log and fulfill
demarcation of restating.
• For high log, comparison between wide and high more
than 2,5 for log to continue and more 4,5 for log to the 2
fulcrums.
• Interesting bone minimum to every surface of log.
• Width surface of minimum bone steel  12 mm.
• Distance each bone may not more than 15 cm and less
than 3 cm.
• Distance wedge with chock maximum log 30 cm or 2 / 3
is high log.
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COLUMN :
• Column size measure of strukturil wide minimum = 15
cm.
• Wide minimum bone = 1 % from wide surface of column,
with minimum 1 bone bar in each surface area angle.
• Long Bar bone diameter minimize  12 mm.
• Wide long bone of column may not be taken more than 6
% from wide of surface of concrete.
• If long bone of continued column, tip of bar may not give
by barb.
• Distance wedge with chock maximum at long bone of
column taken smallest from :
- Smallest size measure from wide surface of column.
- 15 times smallest long bone diameter.
- 30 cm
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Thick Cover of Concrete
• Thick cover of minimum concrete have to be taken as
according to Tabel.1.
• Thick cover of concrete have to as according to planning
picture. If not there are in the plan is, thick cover of
concrete can be taken according to Tabel.1, in the
affirmative and pertinent planning.
• In Tabel.1. beside, which interpreted with “ in” is external
area covert concrete of influences of weather ( rain,
direct sun and others) and do not relate to water.
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Tabel.1. Thick Cover of Minimum concrete.
TABLES OF COVER OF
CONCRETE MINIMUM.
(CM)
Construction Parts
Inside
Outside
Do not Seen
Plate and membrane
1
1.5
2
Wall
1.5
2
2.5
Log
2
2.5
3
Column
2.5
3
3.5
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• Which interpreted “ outside” is area when external area
natural concrete influences of weather ( rain, direct sun,
and others) and relate to water.
• While which interpreted “ do not seen” when external
area concrete after concrete finish worked cannot be
estimated again.
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B. At constructions and or parts of concrete construction of
pre print, thick cover of concrete can be taken less than
which determined like sentence ( a ) with minimum 1
coming from accuracy of printing; mould and way of
moulding can guarantee thickly cover of the concrete
and concrete cures is in such a manner so that can limit
barstly effect dwindle.
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C. In all matter, thick cover of concrete may not less than
which determined following:
•
At artless bar.
•
At bar which profile.
•
•
At binding bone.
where d is artless bar diameter, dp is diameter
identification of bar which profile according to Section
3.7 sentence ( 4 ) and de is diameter of equivalent bind
bone according to section 3.7 sentence ( 6).
:d
: dp
: de
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D. Thick cover of concrete which determined in sentence (
a) up to ( c ) have to be added with minimum 1 cm if
surface of the concrete located in in corrosive
environment, like when:
• relate to sea water.
• getting influence of alkali sulphate of ground water or
ground.
• relate to corrosive gass or vapour.
• In this case, hence before planning started is thick
cover of the concrete have to be specified ahead by
planner pursuant to study regarding the nature of
corrosive the than that environment also take counsel
with taskmaster.
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WORK AND INSTALLATION OF BONE
Work of Amputation and Retortion.
1. Work Detail and installation have to be prepared as job
picture which must be made by Contractor before
execution of work and agreed by Board of directors
Field.
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2. Barb have to be passed to each terminating of artless
bone.
Barb thread iron only required if fulfilling the following
situation :
• Especial bone laying in every column angle and log
which is not covert.
• Chock.
• Placement above two fulcrums.
• By the end of bone to the from cantilever beam and
plate.
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Column
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