Principles of Structural Analysis: Static and Dynamic Loads

Principles of Structural Analysis: Static and Dynamic Loads 

Krishnan Sathia

Preference :

We know that there are various types of forces, moments, pressures, internal strains, and other

stress-inducing agents that act on a structure. In structural engineering parlance, they are called

loads.

Loads can be broadly classified into:

Static loads

Dynamic loads

Content :

• Loading
• Load Generation
• Combining Load Cases
• Dynamic Properties of Structures
• Dynamic Loads

Download Principles of Structural Analysis: Static and Dynamic Loads free PDF

LINK

Advanced Steel Design of Structures

Advanced Steel Design of Structures 

Srinivasan

Preference :

Advanced steel design explores the domain of research and understanding both analysis and design of steel structures in general and offshore compliant structures in particular. The convenience that steel possesses to recycling, repair, and retrofit in comparison to other construction materials, both commercial and eco-friendly points of view is one of the primary advantages. The material strength of steel beyond yield value intuits the plastic design of structures but also warrants about the permanent plastic deformation under excessive loading. A chapter in plastic design deals with a few examples, highlighting the basics.

Content :

• 1: Introduction. Chapter 
• 2: Plastic Design of Structures. 
• 3: Blast, Fire, and Impact-Resistant Design. 
• 4: Stability of Structural Systems. 
• 5: Mathieu Stability of Compliant Structures.

Download Advanced Steel Design of Structures free PDF

LINK

Electrical Installation Work

Electrical Installation Work 

Brian Scaddan

Preference :

This book is intended for the trainee electrician who is working towards NVQs, gaining competencies in various aspects of installation work. It covers both installation theory and practice in compliance with the 18th edition of the IET Wiring Regulations and also deals with the electrical contracting industry, the environmental effects of electricity, and basic electronics. The material in this book has been arranged to cater to student-centered learning programs. Self-assessment questions and answers are provided at the end of chapters. Since January 1995. As there has been no physical change to the system, it is likely that measurement of voltages will reveal little or no difference to those before, nor will they do so for some considerable time to come. However, I have used only the new values in the examples in this book.

Content :

• Basic information and calculations
• Electricity
• Resistance, current and voltage, power and energy
• Electromagnetism
• Capacitors and capacitance
• Resistance, inductance, and capacitance in installation work
• Three-phase circuits
• Motors and generators
• Cells and batteries
• Illumination and ELV lighting
• Electricity, the environment, and the community
• Health and safety
• The electrical contracting industry
• Installation materials and tools
• Installation circuits and systems
• Earthing and bonding
• Protection
• Circuit and design
• Testing
• Basic electronics technology
• Answers to self-assessment questions
• Glossary of Electrical Installation Work

Download Electrical Installation Work free PDF

LINK

The Finite Element Method: Its Basis and Fundamentals

The Finite Element Method: Its Basis and Fundamentals 

O. C. Zienkiewicz,

Preference :

The limitations of the human mind are such that it cannot grasp the behavior of its complex surroundings and creations in one operation. Thus the process of subdividing all systems into their individual components or “elements,” whose behavior is readily understood, and then rebuilding the original system from such components to study its behavior is a natural way in which the engineer, the scientist, or even the economist proceeds. In many situations, an adequate model is obtained using a finite number of well-defined components. We shall term such problems discrete. In others, the subdivision is continued indefinitely and the problem can only be defined using the mathematical fiction of an infinitesimal. This leads to differential equations or equivalent statements which imply an infinite number of elements. We shall term such systems continuous. With the advent of digital computers, discrete problems can generally be solved readily even if the number of elements is very large. As the capacity of all computers is finite, continuous problems can only be solved exactly by mathematical manipulation. The available mathematical techniques for exact solutions usually limit the possibilities of oversimplified situations.

Content :

• 1. The Standard Discrete System and Origins of the Finite Element Method
• 2. Problems in Linear Elasticity and Fields
• 3. Weak Forms and Finite Element Approximation
• 4. Variational Forms and Finite Element Approximation
• 5. Field Problems: A Multidimensional Finite Element Method 
• 6. Shape Functions, Derivatives, and Integration
• 7. Elasticity: Two- and Three-Dimensional Finite Elements
• 8. The Patch Test, Reduced Integration, and Nonconforming Elements
• 9. Mixed Formulation and Constraints: Complete Field Methods
• 10. Incompressible Problems, Mixed Methods, and Other Procedures of Solution
• 11. Multidomain Mixed Approximations
• 12. The Time Dimension: Semi-Discretization of Field and Dynamic Problems
• 13. Plate Bending Approximation: Thin and Thick Plates
• 14. Shells as a Special Case of Three-Dimensional Analysis
• 15. Errors, Recovery Processes, and Error Estimates
• 16. Adaptive Finite Element Refinement
• 17. Automatic Mesh Generation
• 8. Computer Procedures for Finite Element Analysis

Download The Finite Element Method: Its Basis and Fundamentals free PDF

LINK

Rock Slope Engineering: Civil and Mining

Rock Slope Engineering: Civil and Mining 

Duncan C. Wyllie

Preference :

A variety of engineering activities require the excavation of rock cuts. In civil engineering, projects include transportation systems such as highways and railways, dams for power production and water supply, and industrial and urban development. In mining, open pits account for the major portion of the world’s mineral production. The dimensions of open pits range from areas of a few hectares and depths of less than 100 m, for some high-grade mineral deposits and quarries in urban areas, to areas of hundreds of hectares and depths as great as 800 m, for low-grade ore deposits. The overall slope angles for these pits range from near vertical for shallow pits in the good quality rock to flatter than 30◦ for those in very poor quality rock.

Content :

• Principles of Rock Slope Design. 
• Structural Geology and Data Interpretation. 
• Weathered Rock and Slope Stability. 
• Site Investigation and Geological Data Collection. 
• Rock Strength Properties and Their Measurement. 
• Groundwater. Plane Failure. Wedge Failure. 
• Circular Failure. Toppling Failure. 
• Seismic Analysis of Rock Slopes. 
• Numerical Analysis. 
• Blasting. 
• Stabilization of Rock Slopes. 
• Movement Monitoring. 
• Civil Engineering Applications. 
• Appendices: Stereonets For Hand Plotting of Structural Geology Data
• Quantitative Description of Discontinuities in Rock Masses
• Comprehensive Solution Wedge Stability
• Conversion Factors.

Download Rock Slope Engineering: Civil and Mining free PDF

LINK

Rotating Machinery Vibration From Analysis to Troubleshooting

Rotating Machinery Vibration From Analysis to Troubleshooting 

Maurice L. Adams

Preference :

Every spinning rotor has some vibration, at least a once-per-revolution frequency component because it is of course impossible to make any rotor perfectly mass balanced. Experience has provided guidelines for quantifying approximate comfortable safe upper limits for allowable vibration levels on virtually all types of rotating machinery. It is rarely disputed that such limits are crucial to machine durability, reliability, and life. However, the appropriate magnitude of such vibration limits for specific machinery is often disputed, with the vendor’s limit usually being higher than a prudent equipment purchaser’s wishes. Final payment for a new machine is occasionally put on hold, pending resolution of the machine’s failure to operate below the vibration upper limits prescribed in the purchase specifications.

Content :

• Primer on Rotor Vibration
• Rotor Dynamic Analyses
• Trouble-Shooting Case Studies
• Monitoring and Diagnostics

Download Rotating Machinery Vibration From Analysis to Troubleshooting free PDF

LINK

Smart Buildings Systems for Architects, Owners and Builders

Smart Buildings Systems for Architects, Owners and Builders 

James M Sinopoli

Preference :

Technology has always influenced the buildings we build, and always will. Twenty-five to 30 years ago, however, the amount of technology in a building was minimal. It consisted of the public telecommunications utility installing its services in a building; a mechanical contractor installing a pneumatic control system for the heating, cooling, and ventilation system; and maybe a word-processing system. Although we have come a long way since those days, we are still in a very early stage of fully deploying and integrating technology systems into buildings. In due course, buildings will become full of technology. Walls and ceilings will be embedded with sensors, and every aspect of a building’s performance and use will be metered and measured. Software tools will be used to automatically optimize building systems without human intervention; real-time information about the building that is relevant to their particular needs will be provided to occupants and building management. Buildings will be fully interactive with the power grid, and geospatial location systems will be deployed for every building asset.

Content :

• What Is a Smart Building?
• The Foundations of a Smart Building
• Heating, Ventilating, and Air Conditioning Systems
• Lighting Control Systems
• Electric Power Management Systems
• Access Control Systems
• Video Surveillance Systems
• Video, IPTV, and Digital Signage Systems
• Fire Alarm and Mass Notification Systems
• Voice Networks and Distributed Antenna Systems
• Data Networks
• Facility Management Systems
• Design, Construction, and Renovations
• The Economics of Smart Buildings
• Audio Visual Systems
• Network Integration
• Energy and Sustainability
• Case Studies

Download Smart Buildings Systems for Architects, Owners and Builders free PDF

LINK

Pavement Engineering: Principles and Practice, Third Edition

Pavement Engineering: Principles and Practice, Third Edition 

El-Korchi

Preference :

Pavements are an essential part of our life. We use them as roads, runways, parking lots, and driveways. Pavements are engineered structures and are important for our everyday life, commerce and trade, and defense. Surface transportation is the most widely used mode of transportation in the world, and a country’s development is often measured in terms of its total paved road mileage. The construction of roads is and will continue to be a major industry in developing countries, and as the infrastructure matures, it will be a major industry in developed countries as well. Like any other engineered structure, pavements are expected to be adequately strong and durable for their design life. They are expected to function properly by providing a smooth traveling surface for the traffic under various conditions of the environment. In order to ensure this, pavements must be designed, constructed, maintained, and managed properly.

Content :

• Introduction and Description of Pavements.
• Principles of Mix and Structural Design and Construction of Asphalt Pavement
• Principles of Structural Design, Mix Design, and Construction of Concrete Pavements. 
• Standards. 
• Systems Approaches to Pavement

Download Pavement Engineering: Principles and Practice, Third Edition free PDF

LINK

Electronic and Electrical Engineering Principles and Practice

Electronic and Electrical Engineering Principles and Practice 

Richard F. Fellows

Preference :

The Modern Construction Handbook has become a building construction classic and is used as a textbook in many courses. Its systematic approach with chapters on materials, walls, roofs, construction, and environment offers clear and efficient orientation. Digital fabrication techniques are included as well (complementing traditional production processes) and presented in an instructional book for the first time. The third edition has been thoroughly updated and now provides More information more annotation of drawings, more text on the page. The updated future chapter with more emerging construction techniques. Updated essays on construction in the introduction Chapter 1. Mote technical data in the Materials Chapter. The content in this third edition has been completely reworked which makes it an even more valuable companion for students and young practitioners!"

Content :

• Circuit analysis
• Sinusoidally-excited circuits
• Operational amplifiers
• Transients
• Bode diagrams and 2-port networks
• Semiconductors
• Diodes
• Bipolar junction transistors
• Field-effect transistors
• Integrated circuits
• Analog circuits
• Power amplifiers, power supplies, and batteries
• Magnetism and electromagnetism
• DC machines
• Three-phase systems
• Transformers
• Induction motors
• Synchronous machines
• Power electronics
• Combinational logic

Download Electronic and Electrical Engineering Principles and Practice free PDF

LINK

Durability Design of Concrete Structures: Phenomena, Modeling, and Practice

Durability Design of Concrete Structures: Phenomena, Modeling, and Practice 

Li, Kefei

Preference :

Durability is a term related to both performance and time, reflecting the degree to which a structure/infrastructure meets its intended functions for a given duration of time. This description applies to all types of structures and infrastructures in civil engineering. Actually, during service life, a structure displays time‐dependent behaviors by aging of the structural materials. The ageing processes can be intrinsic to the structural materials or induced by the interactions between the service conditions and the structural materials. This picture holds all structures and their constitutive materials. In fact, concrete structures have transient behaviors due to some well‐known time‐dependent properties of structural concrete, such as shrinkage and creep. Take creep, for example. Engineers had been challenged by this evolving property as early as the 1900s, the very beginning of concrete structures coming into use. During the following years the lack of consideration of creep, surely due to lack of knowledge, had caused some serious accidents in structural engineering;

Content :

• 1 Carbonation and Induced Steel Corrosion
• 2 Chloride Ingress and Induced Steel Corrosion
• 3 Freeze-Thaw Damage
• 4 Leaching
• 5 Salt Crystallization 
• 6 Deterioration in Structural Contexts
• 7 Durability Design: Approaches and Methods
• 8 Durability Design: Properties and Indicators 
• 9 Durability Design: Applications
• 10 Codes for Durability Design

Download Durability Design of Concrete Structures: Phenomena, Modeling, and Practice free PDF

LINK

Cost Accounting and Financial Management for Construction Project Managers

Cost Accounting and Financial Management for Construction Project Managers 

Len Holm

Preference :

Project engineers (PEs) and project managers (PMs) are not typically known as accountants. Their responsibilities as construction managers (CMs) generally revolve around the paperwork documentation performed at the Jobsite to support superintendents and subcontractors in the construction of a building. And, although much of the financial management activities performed at the Jobsite are not thought of as ‘accounting’ per se they do fall under the cost accounting umbrella, especially when we add and financial management in the title. In addition, everything that is done at the Jobsite is connected with the operations of the construction company in the home office, and it is important that Jobsite managers understand why they manage finances and how the management of finances relates to the operation of the home office accounting department. This book is not meant to be a repeat of standard business-school accounting textbooks or accounting courses, there are many good ones available, but the focus here is on the financial operations of the construction job site team and how they interface with the accounting needs of the home office.

Content :

• Introduction
• Accounting Methods
• Introduction to Construction Management
• Introduction to Estimating
• Jobsite General Conditions
• Home Office General Conditions
• Financial Statements and Financial Ratios
• Cost Control
• Earned Value Analysis
• Activity-Based Accounting
• Supply Chain Material Management
• Equipment Use and Depreciation
• Cash Flow
• Pay Requests
• Accounting for Change Orders
• Financial Close-Out of the Construction Project
• Lean Construction Practices and Cost Management
• Taxes and Audits
• Developer’s Pro forma

Download Cost Accounting and Financial Management for Construction Project Managers free PDF

LINK

Reinforced Concrete Analysis and Design

Reinforced Concrete Analysis and Design 

S. S. Ray

Preference :

This book covers the analysis and design of reinforced concrete elements in foundations and superstructures in a logical, step-by-step fashion. The theory of reinforced concrete and the derivation of the code formulae have been clearly explained. The text is backed up by numerous illustrations, design charts, and tables referring frequently to the relevant codes of practice. A large number of worked examples cover almost all types of reinforced concrete elements. The step-by-step approach will ensure that all design requirements are logically adhered to, a standardized approach is established in a design office, and that a simplified procedure for checking and for quality assurance can be implemented. 

Content :

• 1. Theory of Reinforced Concrete 
• 2. Design of Reinforced Concrete Beams 
• 3. Design of Reinforced Concrete Slabs 
• 4. Design of Reinforced Concrete Columns 
• 5. Design of Corbels and Nibs 
• 6. Design of Pad Foundations 
• 7. Design of Piled Foundations 
• 8. Design of Walls 
• 9. Design of Flat Slabs 
• 10. Design of Connections 
• 11. General Figures, Tables, Charts 

Download Reinforced Concrete Analysis and Design free PDF

LINK

Bridge Design and Evaluation LRFD and LRFR

Bridge Design and Evaluation LRFD and LRFR 

Gongkang Fu

Preference :

Human beings have been constructing bridges for about four thousand years. The oldest and still existing bridge in the world is perhaps the Zhaozhou Bridge in Hebei Province in China, originally constructed approximately in A.D. 600. However, bridge design and construction then may not be considered bridge engineering practice by today’s definition. Instead, work was done based more on experience as opposed to quantitative planning as done now. Bridge engineering today uses calculus-based analysis and detailed planning. Materials used in bridge construction have also changed noticeably through a good number of years, from mainly natural materials such as stones and wood than to mainly man-made materials such as steel and Portland cement concrete today. Due to great improvement in the strength and production quality control of these materials, bridge components have become smaller, thinner, skinnier, and lighter to reduce self-weight and be more economical.

Content :

• Introduction
• Requirements for Bridge Design and Evaluation
• Loads, Load Effects, and Load Combinations
• Superstructure Design
• Bearing Design
• Substructure Design
• Highway Bridge Evaluation

Download Bridge Design and Evaluation LRFD and LRFR free PDF

LINK

Fire Safety Engineering - Design of Structures

Fire Safety Engineering - Design of Structures 

J. Purkiss

Preference :

Before setting the groundwork for the complete subject of fire safety engineering and its influence on the overall planning, design, and construction of building structures, it is necessary to attempt to define what is meant by ‘fire safety engineering’. There is, as yet, no absolute definition, although the following may be found acceptable: Fire safety engineering can be defined as the application of scientific and engineering principles to the effects of fire in order to reduce the loss of life and damage to property by quantifying the risks and hazards involved and provide an optimal solution to the application of preventive or protective measures. The concepts of fire safety engineering may be applied to any situation where the fire is a potential hazard. Although this text is mainly concerned with building structures, similar principles are equally applicable to the problems associated with oil or gas installations or other structures such as highway bridges.

Content :

• Fire Safety Engineering
• Design Philosophies
• Prescriptive Approach
• The behavior of Natural Fires
• Properties of Materials at Elevated Temperatures
• Calculation Approach
• Design of Concrete Elements
• Design of Steel Elements
• Composite Construction
• Design of Timber Elements
• Masonry, Aluminium, Plastics, and Glass
• Frames
• Assessment and Repair of Fire Damaged Structures

Download Fire Safety Engineering - Design of Structures free PDF

LINK

Advanced Composites in Bridge Construction and Repair

Advanced Composites in Bridge Construction and Repair 

Yail Jimmy Kim

Preference :

Advanced composites such as a fiber-reinforced polymer (FRP) are promising materials for civil infrastructure application. Despite their relatively short history in research and implementation, significant advances have been made over the last two decades. Federal and municipal agencies now accept these non-conventional construction materials. Practitioners are eager to use them for their projects to improve the sustainability of constructed structural members. The objective of this book, Advanced Composites in Bridge Construction and Repair, is to identify current scientific challenges facing the infrastructure community, and to address them for the benefit of the general public, technically and socioeconomically. A total of ten chapters have rigorously been reviewed and selected for publication. The authors of each chapter are considered experts and leaders in the research community. Technical contents include the use of advanced composites for bridge construction and performance monitoring, prestressed FRP composites, bond behavior of the composite–concrete interface, non-conventional composite honeycomb bridge decks and all composite superstructures, and repair of deteriorated bridges.

Content :

• 1 - Department of Civil, Construction and Environmental Engineering Marquette University
• 2 - Prestressed fiber-reinforced polymer (FRP) composites for concrete structures in flexure: fundamentals to applications
• 3 - Analyzing bond characteristics between composites and quasi-brittle substrates in the repair of bridges and other concrete structures
• 4 - Identifying damage in honeycomb fiber-reinforced polymer (FRP) composite sandwich bridge decks
• 5 - Large rupture strain (LRS) fiber-reinforced polymer (FRP) composites for seismic retrofit of reinforced concrete (RC) piers
• 6 - All-composite superstructures for accelerated bridge construction
• 7 - Engineered cementitious composites for bridge decks
• 8 - The use of carbon fiber-reinforced polymer (CFRP) composites for cable-stayed bridges
• 9 - Repair of deteriorated bridge substructures using carbon fiber-reinforced polymer (CFRP) composites
• 10 - Sustainable replacement of aging bridge superstructures using fiber-reinforced polymer (FRP) composites

Download Advanced Composites in Bridge Construction and Repair free PDF

LINK

Advanced Automotive Electricity and Electronics

Advanced Automotive Electricity and Electronics 

Michael Klyde

Preference :

Advanced Automotive Electricity and Electronics, published as part of the CDX Master Automotive Technician Series, gives students with a basic understanding of automotive electrical the additional knowledge and experience they need to diagnose and fix complex electrical systems and circuits. Focused on a “strategy-based diagnostics” approach, this book helps students master technical troubleshooting in order to address the problem correctly on the first attempt. Outcome focused with clear objectives, assessments, and seamless coordination with task sheets Reviews basic electrical concepts, wiring diagrams, and circuit diagnosis Demonstrates how to properly diagnose advanced accessory, multiplex, and communication/network computer circuits Combine the latest electrical technology, such as body control systems, collision avoidance systems, and vehicle telematics, with more traditional skills, such as basic gauge clusters and controls

Content :

• 1 Strategy-Based Diagnostics
• 2 Safety
• 3 Basic Tools and Precision Measuring
• 4 Fasteners and Thread Repair
• 5 Electrical Wiring Diagrams
• 6 Circuit Diagnosis
• 7 Relays
• 8 Lighting System Diagnosis (Non-ECU Controlled)
• 9 Diagnosing Motor Circuits
• 10 Instrument Cluster, Non-Multiplex
• 11 Advanced Diagnostic Tools
• 12 Electronic Components
• 13 ECU-Controlled Body Electrical Circuit Diagnosis
• 14 Vehicle Network Systems
• 15 Vehicle SRS Systems
• 16 Body Electrical Accessories

Download Advanced Automotive Electricity and Electronics free PDF

LINK

Design and Construction Building in Value

Design and Construction Building in Value 

Richard F. Fellows

Preference :

This is the second book in a series devoted to the concept of value in buildings, and how those who involved in building procurement may ultimately produce buildings that represent the best ‘value-for-money’ outcomes. Like its precursor, Building in Value: Pre-design Issues, it is intended both for students in construction- and property-related courses at the tertiary level and as a useful resource for industry professionals: property developers, project managers, and cost engineers among others. Once again a wide range of topics have been included, however, the design and construction of buildings is a broad and complex area and no single book could cover all the relevant areas. Once again, though, it brings together in one volume an introduction to many of the parts of the building procurement process that make up the design and construction phase. The reference and bibliography lists at the end of each chapter point readers to a wealth of related material and will thus facilitate the in-depth self-directed study of selected topics, while the editorial comments that precede most of the chapters tie the content of individual chapters to the central theme of ‘building in value’.

Content :

• 1 Construction Management in Practice.
• 2 Introduction to Strategic Management.
• 3 Strategy Systems.
• 4 Industrial Relations.
• 5 Health and Safety in Construction.
• 6 Managing People.
• 7 Financing Business Units.
• 8 Budgeting.
• 9 Financial Performance.
• 10 Quantitative Decision-making.
• 11 Operational Research.

Download Design and Construction Building in Value-free PDF

LINK

Geotechnical Engineering Design

Geotechnical Engineering Design 

Ming Xiao

Preference :

This book presents the fundamental design principles and approaches in geotechnical engineering, including an introduction to engineering geology, subsurface explorations, shallow and deep foundations, slope stability analyses and remediation, filters and drains, Earth retaining structures, geosynthetics, and basic seismic evaluations of slope stability, lateral earth pressures, and liquefaction. It is intended for use as a textbook in the geotechnical design courses for senior undergraduate and M.S. graduate students. Therefore, the topics covered in this book are presented to meet this level. This book applies the principles of soil mechanics and focuses on the design methodologies in geotechnical engineering. The readers of this book are expected to have undertaken a soil mechanics course and already understood the principles of engineering properties of soils, stresses in soils, seepage in soils, soils shear strength, and consolidation.

Content :

• 1. Introduction to Engineering Geology
• 2. Geotechnical Subsurface Exploration
• 3. Shallow Foundation Design
• 4. Introduction to Deep Foundation Design 
• 5. Slope Stability Analyses and Stabilization Measures
• 6. Filtration, Drainage, Dewatering, and Erosion Control
• 7. Soil Retaining Structures
• 8. Introduction to Geosynthetics Design
• 9. Introduction to Geotechnical Earthquake Design

Download Geotechnical Engineering Design free PDF

LINK

Bridges: Their Engineering and Planning

Bridges: Their Engineering and Planning 

George C. Lee

Preference :

A multidisciplinary and accessible introduction to humanity’s favorite structure: the bridge.

Whether you are a student considering a career in civil engineering and transportation planning, a public official interested in the future of infrastructure, or a person who simply cares about bridges, this book offers an accessible and illustrated introduction to the most beloved feature of our built environment. Learn about engineering basics: the forces that bridges must resist to stay aloft and the principles by which engineers decide which types of bridges make sense at which sites. Find out how engineers protect bridges from their greatest threats—the earthquakes, floods, and other hazards that can cause catastrophic damage.

Content :

• Crossing the Bridge before We Get There
• Counting Our Bridges
• Understanding Stresses and Strains
• Bridge Types and Sites
• Making Strong Bridges: Dealing with Uncertainty
• Resisting Extreme Events
• Is It Worth It? Costs, Benefits, and Tough Decisions
• Traffic across the Bridge
• The Bridge in the Environment
• Delivering the Bridge
• A Bridge Spanning a Millennium

Download Bridges: Their Engineering and Planning free PDF

LINK