Build Ability OF DESIGN · iii) 80% of door sizing follow MS 1064 Part 4: 2001 80% 4 ii) 100% of...
Transcript of Build Ability OF DESIGN · iii) 80% of door sizing follow MS 1064 Part 4: 2001 80% 4 ii) 100% of...
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TOPIC 4
Build Ability OF DESIGN
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CONTENTS:-
Concept of build ability
Examples of Prefabricated Components
Used in Buildings
General Guidelines on Design Concepts
Using Components
Examples of Projects Employing
Components
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build ability
Defined as “ the extend to which design of the
buildings facilitates ease of construction, subject to the overall requirements of completed building.”
Construction Industry Research and Information Association (CIRIA)
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Definition focused on the link between design and construction
and implied factors which have significant impact on the ease of
construction of a project.
BUILD
ABILITY
DESIGN
Influence on
design decisio
ns
CONSTRUCTION
Impact of
design decisio
ns
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Also defined as “the ability to construct a building efficiently, economicallyand to agreed quality levels from its constituent materials, component andsub-assemblies”.
KEY FEATURES OF build ability DESIGN
•Usage of Components
•Employment of Modular Coordination in Dimensions
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DISCUSS IN 5 MINUTES:-
What is the relationship between build ability with usage of component and modular
coordination in construction?
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The usage of component such as IBS component will
speed up the construction process.
With the employment of modular coordination, the size
and dimension of the component will be standardize and
reduce the problem on site.
Thus, it helps to construct building efficiently,
economically with agreed quality level = build ability.
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The goal of build ability is to achieve optimum
integration of construction knowledge in the building
process and balancing the various projects and
environmental constraints to achieve maximisation of
projects and environmental constraints to project goals
and building performance (Construction Industry
Institute, Australia (CIIA)
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BUILD ABILITY AS KEY ELEMENTS IN BUILDING PRODUCTION
a workable concept of build ability needs to recognise the many
factors in a project environment which has an impact on the design
process, the construction process, and the link between design and
construction.
The extent to which decisions, made during the whole building
procurement process, ultimately facilitate the ease of construction
and the quality of the completed project.
Earlier research stated that the designers are responsible to design
the simplest method statement dealing with onsite detailed works.
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The elaborate designs should be able to smooth the progress
of construction programme, thus critical path of site
operations can be variable in despite of the complexity of task
sequencing and the interrelationship between different sub-
contractual works; e.g. material on site, material storage,
material handling, details positioning and installation.
The efficient programme management occupies high mark of
construction safety environment.
Likewise, site accidents and unwanted expenditure can be
diminished.
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A building should be up in an economic and efficient manner requires a logical organization of the assembly sequence. Each sequence of
activity must be made possible by ensuring that materials, components and sub-assemblies are delivered to site, handled, stored,
converted and prepared ready for assembly into the building (Figure 1).
Labour, plant, and equipment must be well managed to ensure continuity of work through the flow of materials, components, and sub-
assemblies into the construction process.
Good build ability assisted by efficient management ensures a logical sequence to the assembly to ensure the building process can be
easily followed to optimise the building process.
Care must be taken that, agreed quality level in terms of “function and performance” and aesthetics in relation to “cost and build ability”
is achieved at the end of the building process to ensure project success.
Figure 1 Assembly sequence on construction site
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DCC 2052
Industrialised Building System
IBS SCORE
(CIS 18: 2010 – MANUAL FOR IBS CONTENT SCORING SYSTEM )
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CIS 18 : 2010
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IBS Score
Calculation
Examples
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ASSESSMENT METHOD
IBS Content Scoring System (“IBS Score”)
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ASSESSMENT METHOD
IBS Content Scoring System (“IBS Score”)
Capacity utilization of prefabricated (precast) beam / column / slab
= 750m2 = 75%
FROM Table 1:- for precast beam/column/slab, F = 1.0
Capacity utilization of conventional methods (in situ)
= 250 m2 = 25%
Total Area of Construction = 1,000 m2
25% 75%
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ASSESSMENT METHOD
IBS Content Scoring System (“IBS Score”)
FROM Table 1: for in-situ, F = 0
25% 75%
Total Area of Construction = 1,000 m2
Capacity utilization of prefabricated (precast) beam / column / slab
= 750m2 = 75%
Capacity utilization of conventional methods (in situ)
= 250 m2 = 25%
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ASSESSMENT METHOD
IBS Content Scoring System (“IBS Score”)
From Table 1, for precast beam/column/slab, F = 1.0
From Table 1, for in-situ, F = 0
Therefore; for Part 1 (Structural System) IBS Score,
= [(75% x 1.0) + (25% x 0)] x 50% = 37.5 %
25% 75%
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ASSESSMENT METHOD
IBS Content Scoring System (“IBS Score”)
Length of precast panel walls (precast concrete)
= 7,500 m = 75%
Table 2, precast concrete panel, F = 1.0
Table 2, common brickwall, F = 0
Length of brickwalls (common bricks)
= 2,500 m = 25%
Total length of the wall is = 10,000 m run
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Therefore, total score for Part 2 (Wall System)
= [(75% x 1.0) + (25% x 0)] x 20%
= 15%
ASSESSMENT METHOD
IBS Content Scoring System (“IBS Score”)
Table 2, precast concrete panel, F = 1.0
Table 2, common brickwall, F = 0
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Example 1
2-storey Terrace House
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The measurement taken from drawings:
1) Construction area
i) Construction area ground floor = 117.0 m2
ii) Construction area 1st floor = 117.0 m2
iii) Construction roof area = 117.0 m2
Total construction area = 351.0 m2
2)Structural Systems
i) Beams: Precast concrete beams
ii) Columns : In-situ concrete using steel formworks
iii) Floor slab: Precast half slabs floor
iv) Roof truss: Prefabricated timber roof truss.
3) Wall System
i) Internal wall:Precast concrete panel (43.9 m)
ii) External wall: Precast blockworks (39.8 m)
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Other simplified construction solutions
i) Beams: 60% complies to MS 1064
Columns: 100% complies to MS 1064
Walls and slabs: Less than 50% complies to MS 1064
Doors : 80% complies to MS 1064
Windows: 0% complies to MS 1064
ii) Horizontal repetition of structure = 100%
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72.1IBS CONTENTS SCORE OF PROJECT (Part 1 + Part 2 + Part 3)
16Total Part 3
6100%iv) Horizontal repetition of structure = 100%
480%iii) 80% of door sizing follow MS 1064 Part 4: 2001
4100%ii) 100% of column sizing follow MS 1064 Part 10: 2001
260%i) 60% beam sizes follow MS 1064 Part 10: 2001
Part 3: Other simplified construction solutions
14.81.00167.3 mTotal Part 2
0.48 x 1.0 x 20
=9.6
(79.5/167)
=0.481.0079.5 mInternal wall using precast concrete panel
0.52 x 0.5 x 20
=5.2
(87.8/167)
=0.520.587.8 mExternal wall using precast concrete blockworks
Part 2: Wall System
41.31.00351.0 m2Total Part 1
0.33 x 1.0 x 50
=16.5
(117/351)
=0.331.0117.0 m2Roof truss using prefab roof truss
Roof area = 117.0m2
0.33 x 0.6 x 50
=9.9
(117 / 351)
=0.330.6117.0 m2
Precast beams + in-situ column with reusable formwork
(no floor)
1st floor area = 117.0m2
0.33 x 0.9 x 50
=14.9
(117 / 351)
=0.330.9117.0 m2
Precast beams + in-situ column with reusable formwork
+ precast concrete half slab floor.
Ground floor area = 117.0m2
Part 1: Structure Elements
IBS
SCORECOVERAGE
IBS
FACTOR(1)
AREA (m2) or
Length (m)ELEMENTS
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Example 2
18 Storey Condominium
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The measurement taken from drawings:
1) Construction Area Area for 1 unit of condominium = 94.4 m2
Lift lobby area = 140 m2
Area for 1 floor = [94.4 x 6 units + 140] = 706.4 m2
2) Structural Systemsi) Tunnel formwork systemii) Roof truss: prefab steel roof truss.
3) Wall System/ floori) Precast blockworks (6 units + lobby area)= 263 m lengthii) Tunnel formwork (6 units + lobby area) = 120 m length
4) Other simplified construction solutionsi) Doors : 100% comply to MS 1064
Windows: 100% comply to MS 1064ii) Repetition of floor to floor height = 90%
Vertical repetition of structural floor layout = 80%
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53.6IBS CONTENTS SCORE OF PROJECT (Part 1 + Part 2 + Part 3)
12Total Part 3
280%iv) Vertical repetition of structure floor layout = 80%
290%iii) Repetition of floor height = 90%
4100%ii) 100% of windows complies to MS1064
4100%i) 100% door sizes complies to MS1064
Part 3: Other simplified construction solutions
Total Part 2 10.61.006,894
0.31x 0.6 x 20
=3.722,160/6,894 =0.310.62,160
ii) Tunnel formwork
Total length
= 120 m x 18 storey
0.69 x 0.5 x 20
=6.94,734/6,894 =0.690.54,734
i) Internal wall: precast blockwork
Total length
= 263 m x 18 storey
Part 2: Wall System
31.01.0013,421.4 m2Total Part 1
0.05 x 1.0 x 50
=2.5
706.4/13,421.4
=0.051.0706.4 m2ii) Roof truss - prefab steel
Roof area = 706.4m2
0.95 x 0.6 x50
=28.5
12,715 / 13,421.4
=0.950.6012,715 m2
i) Tunnel formwork system
Total area
= 706.4m2 x 18 storey = 12,715m2
Part 1: Structure Elements
IBS
SCORECOVERAGEFACTOR
AREA (m2) or
Length (m)ELEMENTS
![Page 54: Build Ability OF DESIGN · iii) 80% of door sizing follow MS 1064 Part 4: 2001 80% 4 ii) 100% of column sizing follow MS 1064 Part 10: 2001 100% 4 i) 60% beam sizes follow MS 1064](https://reader033.fdocuments.in/reader033/viewer/2022052808/6073053628025a42496680a5/html5/thumbnails/54.jpg)
Example 3
IBS Score For Project (Group Of Buildings)
![Page 55: Build Ability OF DESIGN · iii) 80% of door sizing follow MS 1064 Part 4: 2001 80% 4 ii) 100% of column sizing follow MS 1064 Part 10: 2001 100% 4 i) 60% beam sizes follow MS 1064](https://reader033.fdocuments.in/reader033/viewer/2022052808/6073053628025a42496680a5/html5/thumbnails/55.jpg)
PROJECT INFORMATIONS:
Main buildings in the development consist of 5 blocks of buildings. The
IBS score for each building are:-
i) Block A - 5 storey apartment
Construction area, QST (building)A = 3,000 m2
IBS Score(building A) = 83
ii) Block B - 5 storey apartment
Construction area, QST (building)B = 3,000 m2
IBS Score(building B) = 87
iii) Block C - 4 storey apartment
Construction area, QST (building)C = 3,200 m2
IBS Score(building C) = 35
iv) Block D - 4 storey apartment
Construction area, QST (building)D = 3,200 m2
IBS Score(building D) = 47
v) Block E - 3 storey office block
Construction area, QST (building)E = 3,000 m2
IBS Score(building E) = 75
Total construction area (block A + B + C + D + E ) = 15,400 m2
![Page 56: Build Ability OF DESIGN · iii) 80% of door sizing follow MS 1064 Part 4: 2001 80% 4 ii) 100% of column sizing follow MS 1064 Part 10: 2001 100% 4 i) 60% beam sizes follow MS 1064](https://reader033.fdocuments.in/reader033/viewer/2022052808/6073053628025a42496680a5/html5/thumbnails/56.jpg)
BlockConstruction
Area (m2)Coverage
IBS
Score(building)
IBS Score(project)
A 3,0003000 / 15400
= 0.19583 0.195 x 83 = 16.2
B 3,0003000 / 15400
= 0.19587 0.195 x 87 = 17.0
C 3,2003200 / 15400
= 0.2135 0.21 x 35 = 7.4
D 3,2003200 / 15400
= 0.2147 0.21 x 47 = 9.9
E 3,0003000 / 15400
= 0.19575 0.195 x 75 = 14.6
Total 15,400 1.0 65.1