Formwork for Concrete Structures by R.L.Peurifoy and G.D- By EasyEngineering.net

4 Chapter One
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Chapter 1, Introduction, provides an introduction to this book,
including its purpose, the importance of safety, and general information
related to allowable stresses for form materials and patented
products that are available for forming concrete structures.
Chapter 2, Economy of Formwork, provides information related
to the importance of economy in formwork. Because formwork is a
major cost of concrete structures, planning and designing the formwork
system is an integral part of the process of designing and constructing
concrete structures. There are decisions that must be made
during the design process that will have major impacts on the construction
process and the cost of the structure.
Chapter 3, Pressure of Concrete on Formwork, presents information
related to the pressure that concrete exerts on the formwork.
When concrete is placed in the forms, it applies vertical loads due to
its weight as well as horizontal loads because it is in a liquid state and
has not gained sufficient strength to support itself. In addition to the
loads on the formwork from concrete and reinforcing steel, the
designer must consider the live loads that are applied to the forms
due to workers and equipment that are used to place the concrete.
Chapter 4, Properties of Form Material, provides information related
to the properties of form materials. The principal materials used for forms
include wood, steel, plywood, fiberglass, plastics, aluminum, and other
materials. The designer must know the physical properties and the
behavior of the materials that are used in building forming systems for
concrete structures. Accessories used to attach the components of form
materials are also an important part of formwork. The accessories used to
fasten the form materials include nails, screws, bolts, form ties, column
clamps, and other parts too numerous to mention.
Chapter 5, Design of Wood Members for Formwork, presents the
fundamental concepts and equations that are used to design formwork
and temporary structures during construction. The design of
formwork involves determining the pressures and loads from the
concrete placement during construction, analysis of the loads to
determine the distribution of the loads through the formwork system,
and selecting the sizes of members to sustain the loads adequately.
The formwork must be designed with sufficient strength to
resist loads that are applied and to restrict the deflection of the forms
within an allowable tolerance. Safety, economy, and quality must be
major considerations in designing formwork.
Chapter 6, Shores and Scaffolding, provides information related
to shores and scaffolding for formwork. Patented shores are often
used to support formwork. If patented shores are used, it is important
that placement and spacing of the shores be in accordance with
the manufacturer’s recommendations. In some situations, shores are
fabricated by workers at the jobsite. If job-built shores are used, it is
important that a qualified person be involved in ensuring the safety
of the shoring system because failure of shores is a common cause of
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