Market challenge & opportunities in construction sector in ksaSamer MOBAYED
The document summarizes opportunities and challenges in the construction industry in Saudi Arabia. It outlines that Saudi Arabia represents the largest construction market in the Middle East and one of the fastest growing markets globally. The King has announced $430 billion for development projects over five years and the 2011 budget of $154.7 billion will support growth in infrastructure, transport, education and real estate construction. The document then details various construction sub-sectors and major project opportunities, as well as challenges such as cultural differences, visa restrictions, and competition. It proposes collaborations and niche market focus to overcome challenges.
The document provides an overview of key construction documentation topics including:
1) Obtaining work through various contract types such as competitive bid, design-build, and construction management.
2) The components of a project manual including drawings, specifications, contract documents and addenda.
3) Requirements for documentation of activities, circumstances, meetings and correspondence throughout the project.
The document provides background information on Building Information Modelling (BIM) for public sector projects. It discusses how BIM has evolved from 2D CAD drawings to 3D parametric modelling with integrated data. BIM allows different stakeholders to collaborate by sharing a central information model containing data about a building. The government is pushing for BIM adoption on public sector projects, with the goal of mandating BIM on all appropriate projects by 2016. The document reviews literature on the benefits and barriers of BIM, and provides a case study of a public library project using BIM to understand its implications for public sector construction.
The document discusses price adjustment and escalation clauses that are commonly used in construction contracts in India. It provides the following key points:
- WPI (Wholesale Price Index) is used for goods, while CPI (Consumer Price Index) can be used for both goods and services.
- Price adjustment formulas use indices with suffixes - O for base index and I for current index.
- Components like cement, fuel (POL), and labor have separate adjustment formulas based on relevant price indices from sources like the Ministry of Commerce.
- Examples are provided for calculating price escalation for cement using consumption quantities and cost indices from different months.
- An overview of escalation clauses used by government
Provisional sums are amounts included in a construction contract for work that is not fully defined at the time of tendering. There are two types: defined provisional sums where some information is provided, and undefined where minimal information is given. Contractors are expected to account for these sums in their programming and preliminaries. Provisional sums are expended through an architect's instruction and valued like a variation. Risks include the actual cost exceeding the amount allowed if the work changes from tender to completion. Prime cost sums are for nominated subcontractors or suppliers, and exclude any overhead and profit for the main contractor.
In this presentation I gave one overall overview about BIM workflow for Construction and D&B companies.
BIM is not a tool, BIM is not a software, BIM is a way of thinking about the project and put together processes to exchange information during the entire lifecycle.
This presentation is mainly focused on Autodesk platform but is applicable to many other solutions.
Market challenge & opportunities in construction sector in ksaSamer MOBAYED
The document summarizes opportunities and challenges in the construction industry in Saudi Arabia. It outlines that Saudi Arabia represents the largest construction market in the Middle East and one of the fastest growing markets globally. The King has announced $430 billion for development projects over five years and the 2011 budget of $154.7 billion will support growth in infrastructure, transport, education and real estate construction. The document then details various construction sub-sectors and major project opportunities, as well as challenges such as cultural differences, visa restrictions, and competition. It proposes collaborations and niche market focus to overcome challenges.
The document provides an overview of key construction documentation topics including:
1) Obtaining work through various contract types such as competitive bid, design-build, and construction management.
2) The components of a project manual including drawings, specifications, contract documents and addenda.
3) Requirements for documentation of activities, circumstances, meetings and correspondence throughout the project.
The document provides background information on Building Information Modelling (BIM) for public sector projects. It discusses how BIM has evolved from 2D CAD drawings to 3D parametric modelling with integrated data. BIM allows different stakeholders to collaborate by sharing a central information model containing data about a building. The government is pushing for BIM adoption on public sector projects, with the goal of mandating BIM on all appropriate projects by 2016. The document reviews literature on the benefits and barriers of BIM, and provides a case study of a public library project using BIM to understand its implications for public sector construction.
The document discusses price adjustment and escalation clauses that are commonly used in construction contracts in India. It provides the following key points:
- WPI (Wholesale Price Index) is used for goods, while CPI (Consumer Price Index) can be used for both goods and services.
- Price adjustment formulas use indices with suffixes - O for base index and I for current index.
- Components like cement, fuel (POL), and labor have separate adjustment formulas based on relevant price indices from sources like the Ministry of Commerce.
- Examples are provided for calculating price escalation for cement using consumption quantities and cost indices from different months.
- An overview of escalation clauses used by government
Provisional sums are amounts included in a construction contract for work that is not fully defined at the time of tendering. There are two types: defined provisional sums where some information is provided, and undefined where minimal information is given. Contractors are expected to account for these sums in their programming and preliminaries. Provisional sums are expended through an architect's instruction and valued like a variation. Risks include the actual cost exceeding the amount allowed if the work changes from tender to completion. Prime cost sums are for nominated subcontractors or suppliers, and exclude any overhead and profit for the main contractor.
In this presentation I gave one overall overview about BIM workflow for Construction and D&B companies.
BIM is not a tool, BIM is not a software, BIM is a way of thinking about the project and put together processes to exchange information during the entire lifecycle.
This presentation is mainly focused on Autodesk platform but is applicable to many other solutions.
Use of BIM in planning and construction and implementation in real projectMANNU KUMAR
This document provides an overview of Building Information Modeling (BIM) including definitions, the evolution of BIM and design processes, different levels of BIM implementation, and the progression of BIM from 3D to 7D. It discusses advantages and uses of BIM such as improved visualization, coordination, productivity and quality. The document also includes case studies on BIM implementation for infrastructure and building projects in India and China, highlighting challenges addressed and outcomes like reduced costs, clashes, and improved planning.
The document provides an introduction to the role of quantity surveyors in construction projects. It discusses that quantity surveyors are responsible for financial aspects of construction and provide various services throughout a project, including preparing initial budgets and cost estimates, tender documents, valuations of work, and final accounts. It also describes the different stages of a project where quantity surveyors are involved, such as pre-tender, tender, and post-tender stages, and the tasks performed during each stage.
This document provides an introduction to Building Information Modeling (BIM) in the construction industry. It discusses how BIM is becoming a standard collaboration process that provides owners and managers with robust information across the entire lifecycle of construction projects. The document outlines the history and development of BIM, from its origins in the 1960s to its current uses. It also identifies some common BIM authoring tools used for architectural, structural, and mechanical/electrical/plumbing modeling.
This document discusses Building Information Modeling (BIM) and its implementation. It begins with definitions of BIM and explains its benefits such as better project outcomes, cost savings, and reduced risks. It then discusses challenges of BIM implementation including lack of expertise, resistance to change, and perceived costs. Key pillars for successful BIM implementation are identified as having a clear vision, leadership, and implementing incremental integrated changes. Methods for fitting BIM to different scales are provided along with common mistakes to avoid. The document concludes with discussions of project controls, optimization, and return on investment when using BIM.
The document discusses the Build Operate Transfer (BOT) model, where a private sector builds infrastructure, operates it, and eventually transfers ownership to the government. It involves the host government, concessionaire, lending banks, and other parties. Under the model, the private developer designs and implements large projects, operates them to charge customers and realize profit for a specified period, before transferring ownership. Key risks include political, technical, financing, and costs. Recent BOT examples discussed are developing new railway lines in India and the Delhi Noida Direct expressway.
Presentation tries to give an overview and brief about tendering used in the building works for the benefit of students of architecture. Additions and alterations can be made to make it a better one. It is based on the book of Professional practice by Krishnamurthy and Ravindra
This document outlines the roles and responsibilities of the project team involved in the 9 unit Kuarters dan Menaiktaraf Masjid Saidina Abu Bakar AS-Siddiq project. It includes the project manager overseeing planning, scheduling, budgeting, and monitoring progress. The architect is responsible for design drawings and advising throughout implementation. Other roles include the landscape architect, quantity surveyor, civil and structural engineers, and mechanical and electrical engineers, all providing specialized services and working closely together.
The document describes the typical process for construction projects, which involves several key stages:
1) A need is identified, initial plans are developed, and a designer is selected.
2) Conceptual and final designs are created along with cost estimates. Bids are solicited from contractors.
3) A contractor is selected and construction begins according to the project plans.
4) Once completed, the facility is used and maintained over its lifespan.
This document outlines the risks and challenges for a major construction project in Qatar for the 2022 FIFA World Cup. It discusses risks in the engineering, procurement, construction, commissioning, and contractual phases. Key risks include overlapping design phases, long lead times for materials and equipment, shortage of skilled labor, inflation impacts due to compressed schedules, and potential for increased costs and claims from delays. The summary emphasizes that successfully addressing these challenges will require open collaboration between all project stakeholders.
Construction Project Management is an important subject to learn in Civil Engineering.
Significance • As construction involves various activities starting from the design and planning to project completion and quality check, there is a exorbitant need for Management of construction. • Construction Industry plays a crucial role in the economy and development of a nation.
4. Objectives To complete the project in specified time and with allocated budget. To Plan and schedule the work and distribute between various departments. Deployment of personnel in Different tasks. To achieve High quality workmanship. Creating an organisation that works as a team. Using the limited available resources and producing maximum output. Providing safe and satisfactory working conditions for all personnel and workers.
5. Functions: Planning & Scheduling Organizing Staffing Directing Controlling & Co-ordinating
6. Stages of construction Briefing Designing Tendering Construction Commissioning
7. 1) Briefing Stage • This stage consists of framework required for the construction work to take a shape from the ideology of client and feasibility of Project which involves architects, engineers and project manager.
Objectives Developing Alternatives Feasible Solution ? Evaluation of Alternatives Report & Recommendation Technical and non technical Investigations
8. 2) Designing or planning Stage Prepare construction schedule Prepare final cost estimate Prepare Working Drawings and specificati ons Prepare scheme and detailed designs Soil investigations, Topographic investigation, material supply and market surveys etc Carry out Technical Investigations Final adoption of the most suitable summary Finalize Project Summary
Building Information Modeling (BIM) & Industry Foundation Classes (IFC)metalalp
The document discusses Building Information Modeling (BIM) and Industry Foundation Classes (IFC). It defines BIM as a process for generating and managing building data throughout its lifecycle using 3D modeling software. IFC is described as an open standard developed to facilitate interoperability between BIM software applications. Examples are given of how IFC represents building elements and projects using it around the world. In conclusion, the document states that while BIM and IFC are emerging technologies, IFC has become a de facto standard for exchanging building data internationally.
The document discusses international EPC (engineering, procurement, and construction) projects. It defines EPC projects and international EPC projects. Typical international EPC project types include gas processing, power plants, steel mills, and infrastructure projects. The document also outlines the development process for EPC projects including bidding procedures. It discusses business models for international EPC contractors and a SWOT (strengths, weaknesses, opportunities, threats) analysis for contractors working on international projects.
This document discusses the four types of resources (4Ms) required for construction projects - Money, Materials, Machinery, and Manpower. It provides details on each type of resource, including how money is managed, the different types of materials used, factors to consider when selecting machinery, and types of labor. Productivity standards for workers and establishing workers' production norms are also covered. The minimum wage laws and other relevant acts for the construction industry are outlined. Finally, common earthmoving equipment used for construction projects is classified and described.
This document provides an overview of the role and responsibilities of a Quantity Surveyor. It discusses that Quantity Surveyors provide cost management and advice for construction projects. They work to ensure projects are completed within budget. The document outlines the key tasks Quantity Surveyors perform at different stages of a construction project, including cost planning, estimating, procurement, payment certification, and ensuring fairness between contractors and employers. It also describes the different types of drawings involved in construction projects and the roles of those drawings.
The presentation covers following areas:
- Typical Problems in Construction Industry
- What is BIM?
-BIM Process
- Influence of BIM on Industry Problems
- BIM Application
- BIM Advantages
- BIM Workflow
- BIM & Project Management
- BIM & Design Team Members
- BIM around the Globe
- Construction Industry with BIM
All work presented in the presentation is carried out by graduates of NUST, Islambad including Abdul Mughees Khan, Syed Kashif Ali Shah, Sharjeel Ahmad Tariq, Malik Awais Ahmad and Hamza Khan Shinwari.
Special credit of the work goes to Engr Tahir Shamshad, Vice President NESPAK and Engr Zia Ud Din, Asst Professor NUST under guidance and mentor ship the whole work was performed.
For more details feel free to contact: amugheeskhan@gmail.com
ANALISIS PENGARUH INDUSTRI BATU BARA TERHADAP PENCEMARAN UDARA.pdfnarayafiryal8
Industri batu bara telah menjadi salah satu penyumbang utama pencemaran udara global. Proses ekstraksi batu bara, baik melalui penambangan terbuka maupun penambangan bawah tanah, menghasilkan debu dan gas beracun yang dilepaskan ke atmosfer. Gas-gas tersebut termasuk sulfur dioksida (SO2), nitrogen oksida (NOx), dan partikel-partikel halus (PM2.5) yang berbahaya bagi kesehatan manusia dan lingkungan. Selain itu, pembakaran batu bara di pembangkit listrik dan industri menyebabkan emisi karbon dioksida (CO2), yang merupakan penyebab utama perubahan iklim global dan pemanasan global.
Pencemaran udara yang disebabkan oleh industri batu bara juga memiliki dampak lokal yang signifikan. Di sekitar area penambangan, debu batu bara yang dihasilkan dapat mengganggu kesehatan masyarakat dan ekosistem lokal. Paparan terus-menerus terhadap debu batu bara dapat menyebabkan masalah pernapasan seperti asma dan bronkitis, serta berkontribusi pada penyakit paru-paru yang lebih serius. Selain itu, hujan asam yang disebabkan oleh emisi sulfur dioksida dapat merusak tanaman, air tanah, dan ekosistem sungai, mengancam keberlanjutan lingkungan di sekitar lokasi industri batu bara.
Use of BIM in planning and construction and implementation in real projectMANNU KUMAR
This document provides an overview of Building Information Modeling (BIM) including definitions, the evolution of BIM and design processes, different levels of BIM implementation, and the progression of BIM from 3D to 7D. It discusses advantages and uses of BIM such as improved visualization, coordination, productivity and quality. The document also includes case studies on BIM implementation for infrastructure and building projects in India and China, highlighting challenges addressed and outcomes like reduced costs, clashes, and improved planning.
The document provides an introduction to the role of quantity surveyors in construction projects. It discusses that quantity surveyors are responsible for financial aspects of construction and provide various services throughout a project, including preparing initial budgets and cost estimates, tender documents, valuations of work, and final accounts. It also describes the different stages of a project where quantity surveyors are involved, such as pre-tender, tender, and post-tender stages, and the tasks performed during each stage.
This document provides an introduction to Building Information Modeling (BIM) in the construction industry. It discusses how BIM is becoming a standard collaboration process that provides owners and managers with robust information across the entire lifecycle of construction projects. The document outlines the history and development of BIM, from its origins in the 1960s to its current uses. It also identifies some common BIM authoring tools used for architectural, structural, and mechanical/electrical/plumbing modeling.
This document discusses Building Information Modeling (BIM) and its implementation. It begins with definitions of BIM and explains its benefits such as better project outcomes, cost savings, and reduced risks. It then discusses challenges of BIM implementation including lack of expertise, resistance to change, and perceived costs. Key pillars for successful BIM implementation are identified as having a clear vision, leadership, and implementing incremental integrated changes. Methods for fitting BIM to different scales are provided along with common mistakes to avoid. The document concludes with discussions of project controls, optimization, and return on investment when using BIM.
The document discusses the Build Operate Transfer (BOT) model, where a private sector builds infrastructure, operates it, and eventually transfers ownership to the government. It involves the host government, concessionaire, lending banks, and other parties. Under the model, the private developer designs and implements large projects, operates them to charge customers and realize profit for a specified period, before transferring ownership. Key risks include political, technical, financing, and costs. Recent BOT examples discussed are developing new railway lines in India and the Delhi Noida Direct expressway.
Presentation tries to give an overview and brief about tendering used in the building works for the benefit of students of architecture. Additions and alterations can be made to make it a better one. It is based on the book of Professional practice by Krishnamurthy and Ravindra
This document outlines the roles and responsibilities of the project team involved in the 9 unit Kuarters dan Menaiktaraf Masjid Saidina Abu Bakar AS-Siddiq project. It includes the project manager overseeing planning, scheduling, budgeting, and monitoring progress. The architect is responsible for design drawings and advising throughout implementation. Other roles include the landscape architect, quantity surveyor, civil and structural engineers, and mechanical and electrical engineers, all providing specialized services and working closely together.
The document describes the typical process for construction projects, which involves several key stages:
1) A need is identified, initial plans are developed, and a designer is selected.
2) Conceptual and final designs are created along with cost estimates. Bids are solicited from contractors.
3) A contractor is selected and construction begins according to the project plans.
4) Once completed, the facility is used and maintained over its lifespan.
This document outlines the risks and challenges for a major construction project in Qatar for the 2022 FIFA World Cup. It discusses risks in the engineering, procurement, construction, commissioning, and contractual phases. Key risks include overlapping design phases, long lead times for materials and equipment, shortage of skilled labor, inflation impacts due to compressed schedules, and potential for increased costs and claims from delays. The summary emphasizes that successfully addressing these challenges will require open collaboration between all project stakeholders.
Construction Project Management is an important subject to learn in Civil Engineering.
Significance • As construction involves various activities starting from the design and planning to project completion and quality check, there is a exorbitant need for Management of construction. • Construction Industry plays a crucial role in the economy and development of a nation.
4. Objectives To complete the project in specified time and with allocated budget. To Plan and schedule the work and distribute between various departments. Deployment of personnel in Different tasks. To achieve High quality workmanship. Creating an organisation that works as a team. Using the limited available resources and producing maximum output. Providing safe and satisfactory working conditions for all personnel and workers.
5. Functions: Planning & Scheduling Organizing Staffing Directing Controlling & Co-ordinating
6. Stages of construction Briefing Designing Tendering Construction Commissioning
7. 1) Briefing Stage • This stage consists of framework required for the construction work to take a shape from the ideology of client and feasibility of Project which involves architects, engineers and project manager.
Objectives Developing Alternatives Feasible Solution ? Evaluation of Alternatives Report & Recommendation Technical and non technical Investigations
8. 2) Designing or planning Stage Prepare construction schedule Prepare final cost estimate Prepare Working Drawings and specificati ons Prepare scheme and detailed designs Soil investigations, Topographic investigation, material supply and market surveys etc Carry out Technical Investigations Final adoption of the most suitable summary Finalize Project Summary
Building Information Modeling (BIM) & Industry Foundation Classes (IFC)metalalp
The document discusses Building Information Modeling (BIM) and Industry Foundation Classes (IFC). It defines BIM as a process for generating and managing building data throughout its lifecycle using 3D modeling software. IFC is described as an open standard developed to facilitate interoperability between BIM software applications. Examples are given of how IFC represents building elements and projects using it around the world. In conclusion, the document states that while BIM and IFC are emerging technologies, IFC has become a de facto standard for exchanging building data internationally.
The document discusses international EPC (engineering, procurement, and construction) projects. It defines EPC projects and international EPC projects. Typical international EPC project types include gas processing, power plants, steel mills, and infrastructure projects. The document also outlines the development process for EPC projects including bidding procedures. It discusses business models for international EPC contractors and a SWOT (strengths, weaknesses, opportunities, threats) analysis for contractors working on international projects.
This document discusses the four types of resources (4Ms) required for construction projects - Money, Materials, Machinery, and Manpower. It provides details on each type of resource, including how money is managed, the different types of materials used, factors to consider when selecting machinery, and types of labor. Productivity standards for workers and establishing workers' production norms are also covered. The minimum wage laws and other relevant acts for the construction industry are outlined. Finally, common earthmoving equipment used for construction projects is classified and described.
This document provides an overview of the role and responsibilities of a Quantity Surveyor. It discusses that Quantity Surveyors provide cost management and advice for construction projects. They work to ensure projects are completed within budget. The document outlines the key tasks Quantity Surveyors perform at different stages of a construction project, including cost planning, estimating, procurement, payment certification, and ensuring fairness between contractors and employers. It also describes the different types of drawings involved in construction projects and the roles of those drawings.
The presentation covers following areas:
- Typical Problems in Construction Industry
- What is BIM?
-BIM Process
- Influence of BIM on Industry Problems
- BIM Application
- BIM Advantages
- BIM Workflow
- BIM & Project Management
- BIM & Design Team Members
- BIM around the Globe
- Construction Industry with BIM
All work presented in the presentation is carried out by graduates of NUST, Islambad including Abdul Mughees Khan, Syed Kashif Ali Shah, Sharjeel Ahmad Tariq, Malik Awais Ahmad and Hamza Khan Shinwari.
Special credit of the work goes to Engr Tahir Shamshad, Vice President NESPAK and Engr Zia Ud Din, Asst Professor NUST under guidance and mentor ship the whole work was performed.
For more details feel free to contact: amugheeskhan@gmail.com
ANALISIS PENGARUH INDUSTRI BATU BARA TERHADAP PENCEMARAN UDARA.pdfnarayafiryal8
Industri batu bara telah menjadi salah satu penyumbang utama pencemaran udara global. Proses ekstraksi batu bara, baik melalui penambangan terbuka maupun penambangan bawah tanah, menghasilkan debu dan gas beracun yang dilepaskan ke atmosfer. Gas-gas tersebut termasuk sulfur dioksida (SO2), nitrogen oksida (NOx), dan partikel-partikel halus (PM2.5) yang berbahaya bagi kesehatan manusia dan lingkungan. Selain itu, pembakaran batu bara di pembangkit listrik dan industri menyebabkan emisi karbon dioksida (CO2), yang merupakan penyebab utama perubahan iklim global dan pemanasan global.
Pencemaran udara yang disebabkan oleh industri batu bara juga memiliki dampak lokal yang signifikan. Di sekitar area penambangan, debu batu bara yang dihasilkan dapat mengganggu kesehatan masyarakat dan ekosistem lokal. Paparan terus-menerus terhadap debu batu bara dapat menyebabkan masalah pernapasan seperti asma dan bronkitis, serta berkontribusi pada penyakit paru-paru yang lebih serius. Selain itu, hujan asam yang disebabkan oleh emisi sulfur dioksida dapat merusak tanaman, air tanah, dan ekosistem sungai, mengancam keberlanjutan lingkungan di sekitar lokasi industri batu bara.
1. Disusun oleh :
Ilham Raya F
Erlangga Diva P
Esa Putra W
Raafi Puja P
Rangga Permana P
Uday Akhmal F
PERAWATAN DAN PERBAIKAN
ATAP BANGUNAN
2. Sebelum memulai pekerjaan perbaikan dan perawatan
atap baiknya kita memakai Alat Pelindung Diri (APD) agar
dalam pengerjaan tidak terjadi kecelakaan kerja.
Lalu apakah K3LH itu? K3LH adalah suatu program
perlindungan terhadap seluruh karyawan/pekerja agar
senantiasa dalam keadaan sehat dan selamat selama bekerja
di lingkungan pekerjaan.
3. Kacamata melindungi mata dari sinar
matahari
Safety helmet melindungi kepala apabila
terjatuh
Safety belt menahan badan pada saat
perawatan atap
Sarung tangan agar tangan tetap aman saat
bertahan pada tali
Safety shoes agar kaki tidak terpeleset saat
naik ke atap
Tali pengaman guna naik ke atap dan
menahan badan
K3LH DALAM PERAWATAN DAN
PERBAIKAN ATAP
4. Perawatan atap adalah suatu cara untuk menjaga
keawetan dan kenyamanan rumah untuk ditempati.
Ada beberapa cara untuk perawatan atap, yaitu :
1. Perbaiki segera jika di temukan penutup atap yang
bocor untuk menghindari terjadinya pelapukan
struktur pada atap.
2. Lakukan pengecekan secara berkal untuk
menghindari serangan rayap yang datang melalui
dinding atau pipa instalasi listrik.
3. Lakukan pengamatan visuak secara berkala dengan
melihat tampak luar. Apabila ada kerusakan
segera laukukan perbaikan.
PERAWATAN ATAP
5. Ada beberapa cara untuk memperbaiki atap yaitu:
1. Memperbaiki atap yang bocor
Gunakan water proofing
Perhatikan kemiringan atap
Perbaiki genteng yang bocor
Bersihkan talang air
Ganti genting yang rusak atau hancur
2. Rangka atap baja
Perbaiki secara beerkala sambungan baut
perbaiki sesuai kerusakannya
3. Rangka atap kayu
Periksa secara berkala rangka kayu dari pembusukan,
serangan rayap dll
Beri cat kayu pada kayu yang terkena udara secara langsung
Apabila terjadi pembusukan segera ganti dengan yang baru
PERBAIKAN RANGKA ATAP
6. Terjatuh dari ketinggian menggunakan safety belt
Tergelincir menggunakan sepatu
berbahan dasar karet pada bagian bawah sepatunya
Tersengat matahari memakai baju lengan
panjang dan celana panjang
Mata silau menggunakan
kacamata safety
Tersengat listrik sebisa mungkin
matikan listrik saat hendak melakukan perbaikan
RESIKO KECELAKAAN PERAWATAN ATAP
DAN CARA MENGATASINYA