Concrete Folded Plate Roofs

Concrete Folded Plate Roofs

C B Wilby

Preference :

Folded plates have been used on various buildings, for instance storage buildings, swimming
pools, gymnasia, offices, centres, entrances to buildings and tunnels - for examples see Plates
1-18. Sometimes industrialists like to have the facility to hang unpredicted miscellaneous light
loads from anywhere under a roof and regard the structural steelwork as inherently providing this
facility. Because of this requirement the author designed the shells shown in Plate 10 to have a
network of numerous cadmium-plated steel bolts placed through holes in the shells and through
steel anchorage plates of 152 mm (6 in) square on the top surface of the shells. Each bolt protruded
out of the soffit of the shell so that just about anything could be screwed on to it at some
future date. The nuts and plates were covered with a 50 mm (2 in) layer of vermiculite insulation
on the top of the shell, waterproofed with three layers of built-up roofing felt. This facility can
similarly be applied to the plates of folded plate roofs.
Because they are of concrete, such roofs have inherent resistance to fire, deterioration and to
atmospheric corrosion. They allow large spans to be achieved in structural concrete. This allows
flexibility of planning and mobility beneath. Where ground conditions require expensive piled
foundations the reduced number of supporting columns can be an economic advantage. For large
spans in structural concrete folded plates compete with barrel vault roofs. The plates are required
to be thicker than the shells, and there are more firms who will tackle constructing them without
excessive prices, increasing competition and sometimes making the cost more competitive than
for cylindrical shells.



Content :
  • Practicalities
  • Analysis used for the design tables
  • Factors used in the design tables
  • Construction
  • Appendices: Design tables for concrete folded plate roofs


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Quality in the Constructed Project a Guide for Owners, Designers and Constructors

Quality in the Constructed Project a Guide for Owners, Designers and Constructors


Preference :

The purpose of this Guide is to provide project owners, design professionals, and constructors with information and recommendations on opportunities to enhance the quality of constructed projects. While written for these three traditional project participants, this Guide is also intended to be useful to others who are involved in project design and construction, including subcontractors, vendors, operations and maintenance personnel, inspectors, and project users. Additionally, the information in this Guide may be of value to government officials, educators, students, legal professionals, and general readers with an interest in design and construction. Given its broad intended use, this Guide is an “aspirational” document with the goals of educating and stimulating users to identify areas where they may raise the quality level of their practice. This document is not a technical standard, nor a compilation of standard industry practices. Users should not infer that simply following the practices discussed herein will automatically result in improved project quality. Many other factors, some beyond the control of the project team, can affect project outcomes. Project participants are therefore encouraged to modify or vary the processes described in this Guide to achieve the desired quality results for specific projects.



Content :
  • INTRODUCTION
  • THE OWNER’S ROLE AND REQUIREMENTS
  • PROJECT DELIVERY SYSTEMS
  • THE PROJECT TEAM
  • COORDINATION AND COMMUNICATION
  • SELECTING THE DESIGN PROFESSIONAL
  • AGREEMENT FOR PROFESSIONAL SERVICES
  • ALTERNATIVE STUDIES AND PROJECT IMPACTS
  • PLANNING AND MANAGING DESIGN
  • DESIGN DISCIPLINE COORDINATION
  • GUIDELINES FOR DESIGN ACTIVITIES
  • PRE-CONTRACT PLANNING FOR CONSTRUCTION


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Managing the Building Design Process

Managing the Building Design Process

Gavin Tunstall

Preference :

There can be little doubt that towards the latter part of the twentieth century, the creation of
many new buildings in the UK had become an excessively confrontational process, encouraging
clients, designers and builders to seek to gain advantages from one another rather than to
work constructively together. Strict adherence to ‘professional’ roles and an unwillingness to
step over historically defined boundaries discouraged co-operation and collaboration.
Blinkered by contracts, time scales and costs, the process often appeared to be cramped in an
over-demanding, claims-conscious environment, fixated by narrow aims and responsibilities,
seemingly unable or unwilling to reflect a genuine concern with quality or customer care. The
Latham and Egan Reports, published in the 1990s described this situation as wasteful and very
significantly, that it was contributing to a diminution in the quality of both design and construction.
The reports laid the foundations for substantial on-going changes in practice and guidance
developed during the past 10 years.

The process of designing and constructing new buildings is a complex activity reflecting the
skills, perceptions and expectations of many individuals, who must attempt to respond to technical
and philosophical challenges, resolve debates and deal with the inevitable conflicts associated
with working together. The associated personnel difficulties and contractual obligations
cannot be dismissed lightly, but in an ideal scenario, everyone should be capable of appreciating
how and why decisions are taken so that there is a better chance of achieving the best possible
results under the prevailing circumstances. Understanding the process of building design
in terms of what should be done rather than who should do it helps to minimise the negative
restraints of professional boundaries. This book is based on my experience as an architect, but
I use the term building designer to describe the process of design and construction of an imaginary
new building offering a broad stage-by-stage explanation of the way in which ideas can
become reality. Although reference to some technical issues is inevitably based on current UK
practice, for the most part my intension is to discuss general principles, which I believe to be
universally applicable.



Content :
  • Design and the designers
  • Communication
  • Permissions and approvals
  • Inception
  • Design planning
  • The design brief
  • The Design: Function, Part 1 How buildings are used
  • The Design: Function, Part 2 Design and construction constraints
  • The design: aesthetics
  • Construction information
  • Pre-contract administration
  • Construction supervision


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Design of Structural Steelwork Second Edition

Design of Structural Steelwork Second Edition



Preference :

Instruction in structural design has always been considered an essential part of the training of a student engineer, though the difficulties of teaching the subject effectively have not always been completely appreciated. An ideal course should combine theoretical instruction and practical application; limitations of time, space and money generally restrict the latter aspect to calculation and drawing with perhaps the construction and testing of models. But much can be done with pencil and paper to inculcate a sound approach to the design of structures, provided the student is made aware of the fundamentals of design method and the specific problems associated with the various structural materials. The aim of this publication is to present the essential design aspects of one structural material—steel. The book is of an entirely introductory nature, demanding no prior knowledge of the subject, but readers are assumed to have followed (or be following) courses in structural analysis and mechanics of materials in sufficient depth to give them a confident grasp of elementary structural and stress analysis techniques. Although it has been written primarily with undergraduates in mind the book will be of use to young graduates who may be coming across the subject for the first time. For this reason, the example calculations conform as far as possible to practical requirements.

The first chapter commences with a brief review of the historical development of the science of iron and steel making and the use of these two materials in structures, followed by a discussion of the important properties of structural steel, and the types of steel products available for structural use. Design philosophy and stability, outlined in Chapter 2, are followed by a detailed chapter on that most important structural element, the beam. After consideration of local and overall instability the chapter goes on to describe the design of a number of different beam types; rolled sections, compound beams, welded plate girders, gantry girders and composite beams. Chapter 4 is devoted to elements loaded in tension or compression, with or without bending, considering rolled and built-up members, concrete encasement and concrete filling, and the special problems of angle members. Connections are the subject of Chapter 5. Detailed treatment of the fundamentals of connection design is given, with emphasis on highway



Content :
  • Iron and steel
  • Design and stability
  • Beams
  • Axially loaded elements
  • Steelwork connections
  • Design of element assemblies


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