Podcast
Questions and Answers
What is the typical cost range of formwork as a percentage of the total construction cost for concrete framed buildings?
What is the typical cost range of formwork as a percentage of the total construction cost for concrete framed buildings?
- 5% to 15%
- 30% to 70% (correct)
- 50% to 80%
- 10% to 20%
Besides forming systems, what other equipment resources are considered part of the major equipment resources on a construction site?
Besides forming systems, what other equipment resources are considered part of the major equipment resources on a construction site?
- Welding machines and generators
- Trucks and trailers
- Cranes and concrete-placing equipment (correct)
- Excavators and bulldozers
What is the primary consideration when designing vertical formwork?
What is the primary consideration when designing vertical formwork?
- Ease of disassembly for reuse
- Rate of concrete placement and the resulting lateral pressure (correct)
- Aesthetic appeal of the resulting concrete surface
- Cost of materials and labor
Which of the following aspects is a project engineer most involved with regarding forming systems?
Which of the following aspects is a project engineer most involved with regarding forming systems?
Which factor is most crucial in the economic evaluation of different forming system alternatives?
Which factor is most crucial in the economic evaluation of different forming system alternatives?
What differentiates conventional formwork from industrialized formwork?
What differentiates conventional formwork from industrialized formwork?
What is a defining characteristic of industrialized formwork?
What is a defining characteristic of industrialized formwork?
In a layered horizontal formwork system, which component directly supports the sheathing?
In a layered horizontal formwork system, which component directly supports the sheathing?
In a layered vertical formwork system, what is the function of the 'stud'?
In a layered vertical formwork system, what is the function of the 'stud'?
What factor primarily influences the lateral pressure of concrete on vertical forms?
What factor primarily influences the lateral pressure of concrete on vertical forms?
Contractors can obtain forming systems through which of the following methods?
Contractors can obtain forming systems through which of the following methods?
What is the term for several unit-forms attached together to create a single, large form that is moved by a crane?
What is the term for several unit-forms attached together to create a single, large form that is moved by a crane?
In formwork design, which of the following is considered a 'live load'?
In formwork design, which of the following is considered a 'live load'?
What is a key advantage of using self-climbing form systems in vertical construction?
What is a key advantage of using self-climbing form systems in vertical construction?
What is the purpose of 'lifting eyes' on all-steel large-panel wall forms?
What is the purpose of 'lifting eyes' on all-steel large-panel wall forms?
In the context of vertical formwork, what is the purpose of ties?
In the context of vertical formwork, what is the purpose of ties?
Why are forming systems designed and fabricated for many reuses in concrete construction?
Why are forming systems designed and fabricated for many reuses in concrete construction?
Which of the following materials is LEAST likely to be used for horizontal formwork sheathing?
Which of the following materials is LEAST likely to be used for horizontal formwork sheathing?
What is the primary reason for stripping formwork after the concrete has reached sufficient strength?
What is the primary reason for stripping formwork after the concrete has reached sufficient strength?
What role does a formwork supplier NOT typically perform during a construction project?
What role does a formwork supplier NOT typically perform during a construction project?
Which of the following is an advantage of using steel formwork compared to wood formwork?
Which of the following is an advantage of using steel formwork compared to wood formwork?
Formwork must be designed considering both dead and live loads. Which of the following primarily contributes to the dead load on horizontal formwork?
Formwork must be designed considering both dead and live loads. Which of the following primarily contributes to the dead load on horizontal formwork?
What situation might lead a construction company to opt for short-term rental of formwork rather than direct purchase?
What situation might lead a construction company to opt for short-term rental of formwork rather than direct purchase?
What aspect is MOST important when considering the selection and utilization of forming systems?
What aspect is MOST important when considering the selection and utilization of forming systems?
What construction activity directly follows the 'erection' phase of a forming system?
What construction activity directly follows the 'erection' phase of a forming system?
What situation would make industrialized formwork the preferred choice over conventional formwork?
What situation would make industrialized formwork the preferred choice over conventional formwork?
If the rate of concrete placement increases, what happens to the lateral pressure exerted on the vertical forms holding the concrete?
If the rate of concrete placement increases, what happens to the lateral pressure exerted on the vertical forms holding the concrete?
What is the primary reason for using self-climbing form systems?
What is the primary reason for using self-climbing form systems?
What type of structure is not ideally suited for horizontal forming systems?
What type of structure is not ideally suited for horizontal forming systems?
In modern construction, what equipment is commonly used to move Gang Forms?
In modern construction, what equipment is commonly used to move Gang Forms?
Flashcards
What is Formwork?
What is Formwork?
Temporary structures used to contain concrete during construction, accounting for 30-70% of building costs.
Major Equipment Resources
Major Equipment Resources
Essential equipment for concrete construction, including forming systems, cranes, and concrete-placing equipment
Reusable Forming Systems
Reusable Forming Systems
Forming systems are designed for multiple uses in slabs, walls, columns, and other repetitive concrete elements.
Formwork Planning Aspects
Formwork Planning Aspects
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How to Procure Forming Systems
How to Procure Forming Systems
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Conventional Formwork
Conventional Formwork
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Industrialized Formwork
Industrialized Formwork
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Horizontal Formwork System layers
Horizontal Formwork System layers
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Vertical Formwork System layers
Vertical Formwork System layers
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Vertical Formwork Design
Vertical Formwork Design
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What are Ganged Forms?
What are Ganged Forms?
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Dead Loads
Dead Loads
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Live Loads
Live Loads
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Lateral Pressure on Forms
Lateral Pressure on Forms
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Study Notes
Formwork Importance
- Formwork can account for 30-70% of construction costs for concrete-framed buildings.
- Formwork is a major equipment component in these projects.
Forming Systems
- Forming systems are major equipment resources
- Cranes and concrete-placing equipment are further major equipment resources,
- Forming systems, cranes and concrete-placing equipment comprise the production array on construction sites.
Forming System Selection
- Forming system selection and use are closely related to the on-site cranes and concrete-placing equipment.
- Forming systems designed and fabricated for multiple reuses apply to slabs, walls, columns, and repetitive concrete elements.
Project Engineer Role
- The contractor’s project engineer handles planning for selection, ordering, erection, stripping, and reuse of forming systems.
- Construction companies get forming systems through direct purchase or short-term rentals.
Cost Considerations
- Labor costs tied to a selected system are an essential part of economic calculations.
- Labor costs play a role in forming alternative comparisons.
Conventional Formwork Classification
- Conventional formwork gets assembled in situ using standard elements for each use.
- Conventional formwork is disassembled after each use.
Industrialized Formwork Classification
- Industrialized formwork mainly consists of factory-fabricated products.
- Industrialized formwork is used multiple times as one unit.
- Industrialized formwork is used without being disassembled and reassembled for each use.
Formwork Layered Systems (Horizontal)
- In horizontal layered systems, there is sheathing
- In horizontal layered systems, there are joists
- In horizontal layered systems, there are stringers
- In horizontal layered systems, there are shores
Formwork Layered Systems (Vertical)
- A vertical layered system includes sheathing.
- A vertical layered system includes studs.
- A vertical layered system includes a wale.
- A vertical layered system includes ties.
Vertical Systems Design
- Vertical formwork is designed based on placement rate and the resulting lateral pressure curve.
- Vertical formwork design considers liquid concrete pressure and timing of the initial set.
Wall Forms - Ganged Forms
- Gang forms consist of several unit-forms linked together, or a single large one.
- Gang forms are typically moved by crane due to sections being too heavy to be set by hand.
Wall Forms - All-Steel Large-Panel Wall Forms
- These are a type of ganged form.
- All-steel large panel wall forms possess lifting eyes
Vertical Forms
- Suspended wall forms are a type of vertical form.
- Self-climbing (crane-free) form systems are another type of verticle form.
Formwork and The Project Engineer
- The project engineer needs management skills.
- The project engineer works with the formwork supplier.
Berlin Parliament House Project
- This project highlights the offices of the formwork supplier.
Formwork Design - Vertical Loads on Horizontal Forms
- Vertical loads on horizontal forms include dead loads: freshly placed concrete, rebar, and the form's self-weight.
- Vertical loads on horizontal forms include live loads: laborers, equipment, and materials.
Formwork Design - Lateral Pressure on Vertical Forms
- Lateral pressure of concrete is exerted on vertical forms.
- Horizontal pressure on the form's surface relates to the concrete's density and depth in a liquid or semi-liquid state.
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