Presentation1
FORMWORK
Introduction to Formwork
• Formwork is a structure which is usually temporary or part permanent, it is used to contain poured concrete to mould it into required dimensions & support until it is able to support itself. • Formwork has been in use since the long time.
• New materials such as steel, plastics and fiberglass are used in formwork, greater attention is being given to the design, fabrication, erection and dismantling of formwork
Requirements of
Formwork
Accelerates construction schedules Enhances safety level
Improves over-all economy •Should be strong enough to withstand all types of dead and live loads.
•Should be rigidly constructed ,efficiently propped and braced both horizontally and vertically, so as to retain its shape.
•The joints in the formwork should be tight against leakage of cement grout.
•Construction of formwork should permit removal of various parts in desired sequences without damage to the concrete.
•The material of the formwork should be cheap, easily available and should be suitable for reuse.
•The formwork should be set accurately to the desired line and levels should have plane surface. •It should be as light as possible.
Materials used for formworks
Timber ,plywood
Formwork
Plastic Forms
Aluminum forms
Steel formworks
TIMBER
It should
The
timber
FORMS
bebring durable used and for formwork treatable must satisfy the following requirements
Advantages of using timber forms:
It is economical for small construction jobs
It is design flexible and easy to erect
It can easily be made into any shape or size
ALUMINIUM
FORMS
The formwork turns out to
The formwork turns out to
As the strength of aluminum be economical if large in handling, tension and numbers of reuses are made compression is less than the in construction. strength of steel, it is necessary to use large sections. Their lower density, aluminum
The major disadvantage of aluminum forms is that no forms are lighter than steel forms, changes can be
Introduction to Formwork
• Formwork is a structure which is usually temporary or part permanent, it is used to contain poured concrete to mould it into required dimensions & support until it is able to support itself. • Formwork has been in use since the long time.
• New materials such as steel, plastics and fiberglass are used in formwork, greater attention is being given to the design, fabrication, erection and dismantling of formwork
Requirements of
Formwork
Accelerates construction schedules Enhances safety level
Improves over-all economy •Should be strong enough to withstand all types of dead and live loads.
•Should be rigidly constructed ,efficiently propped and braced both horizontally and vertically, so as to retain its shape.
•The joints in the formwork should be tight against leakage of cement grout.
•Construction of formwork should permit removal of various parts in desired sequences without damage to the concrete.
•The material of the formwork should be cheap, easily available and should be suitable for reuse.
•The formwork should be set accurately to the desired line and levels should have plane surface. •It should be as light as possible.
Materials used for formworks
Timber ,plywood
Formwork
Plastic Forms
Aluminum forms
Steel formworks
TIMBER
It should
The
timber
FORMS
bebring durable used and for formwork treatable must satisfy the following requirements
Advantages of using timber forms:
It is economical for small construction jobs
It is design flexible and easy to erect
It can easily be made into any shape or size
ALUMINIUM
FORMS
The formwork turns out to
The formwork turns out to
As the strength of aluminum be economical if large in handling, tension and numbers of reuses are made compression is less than the in construction. strength of steel, it is necessary to use large sections. Their lower density, aluminum
The major disadvantage of aluminum forms is that no forms are lighter than steel forms, changes can be