Know how to erect and strike formwork
This subtopic covers the essential procedures for assembling, erecting, and dismantling formwork used to shape and support fresh concrete for structural elements such as columns, walls, beams, slabs, and precast units. Learners will acquire the knowledge to ensure formwork is correctly positioned, braced, and sealed to achieve the required finish and dimensional accuracy, and to strike formwork in a controlled manner that prevents damage and promotes safety. Practical application involves working to specifications, managing materials, and adhering to safe systems of work on construction sites.
Assessment criteria
Topic Overview
Formworking is a critical skill in construction that involves creating temporary moulds to shape and support wet concrete until it hardens and gains sufficient strength to support itself. In the NOCN Level 2 Diploma in Formworking, you will learn to construct, erect, and dismantle formwork systems for various concrete structures, including foundations, walls, columns, and slabs. This topic is essential because formwork directly impacts the quality, safety, and efficiency of concrete construction, and poor formwork can lead to structural failures, costly delays, and safety hazards.
The diploma covers both traditional timber formwork and modern engineered systems like metal and plastic formwork. You will study how to select appropriate materials, calculate loads, ensure alignment and stability, and apply safe working practices. Understanding formwork is vital for progressing to roles such as formwork carpenter, site supervisor, or concrete engineer. Mastery of this subject ensures you can produce accurate, durable concrete structures that meet design specifications and building regulations.
Formworking fits into the wider construction curriculum by linking with concrete technology, structural design, and health and safety. It requires practical skills in measuring, cutting, and assembling materials, as well as theoretical knowledge of forces, pressures, and curing times. By the end of the diploma, you will be able to interpret drawings, plan formwork layouts, and carry out inspections to ensure compliance with British Standards and industry best practice.
Key Concepts
Core ideas you must understand for this topic
- →Types of formwork: traditional timber, engineered metal, plastic, and reusable systems like climbing formwork and slipforming.
- →Load calculations: understanding dead loads (self-weight of formwork and concrete), live loads (workers, equipment, wind), and lateral pressure from wet concrete.
- →Formwork design principles: ensuring strength, rigidity, alignment, and stability; using ties, props, and bracing to resist forces.
- →Striking times: knowing when to remove formwork based on concrete strength gain, curing conditions, and structural requirements.
- →Health and safety: safe erection and dismantling, working at height, manual handling, and preventing collapse or concrete blowouts.
Learning Objectives
What you need to know and understand
- know how to erect formwork to support concrete columns, walls, beams, slab panels and precast units, know how to strike formwork, know how to work efficiently and safely
Assessment Criteria
Key criteria assessors look for in your portfolio
- Accurately interpret drawings, specifications, and work instructions to identify required formwork types and dimensions for columns, walls, beams, and slabs.
- Demonstrate correct assembly and erection of formwork systems, including proper setting out, alignment, levelling, and installation of ties, bracing, and shutters to contain concrete under load.
- Apply safe striking sequences that consider concrete strength, structural loading, and manufacturer's guidelines, ensuring formwork is removed without sudden release of stored energy.
- Maintain a clean, organised work area and handle materials efficiently to minimise waste and time, while wearing appropriate PPE and using tools correctly.
Assessment Guidance
Guidance for achieving higher grades
- 💡When writing or speaking about formwork, always link your answers to specific standards (e.g., BS 5975:2019) and the relevance of temporary works coordination.
- 💡During practical assessments, talk through your actions: explain why you are using certain ties, bracing patterns, and how you are checking for plumb and line.
- 💡Emphasise safety at every stage—method statements, risk assessments, exclusion zones when striking, and the importance of a permit to load or strike.
- 💡To demonstrate efficiency, show planning: pre-sheeting materials, using appropriate mechanical aids for handling, and repairing/reusing formwork where possible.
- 💡Always show your working when calculating loads and spacing of ties or props. Examiners award marks for method, not just the final answer. Use clear diagrams to illustrate bracing arrangements.
- 💡Know the key British Standards (e.g., BS 5975 for falsework, BS 8110 for concrete) and reference them in your answers. This demonstrates professional awareness and can earn top marks.
- 💡When discussing striking times, mention factors like temperature, cement type, and curing method. A generic answer loses marks; specific details show deeper understanding.
Common Mistakes
Common errors to avoid in your coursework
- Erecting formwork without adequate bracing or tie spacing, leading to deformation or catastrophic failure under hydrostatic pressure of fresh concrete.
- Striking formwork from beams and slabs without verifying that concrete has reached the specified stripping strength, causing sagging or collapse.
- Using damaged or incompatible formwork components that compromise alignment, surface finish, or joint tightness.
- Failing to secure formwork against uplift or lateral movement, particularly for tall columns and walls.
- Misconception: Formwork can be removed as soon as concrete is hard to the touch. Correction: Concrete must reach sufficient compressive strength (often 70% of design strength) before striking; removing too early can cause cracking or collapse.
- Misconception: Any timber can be used for formwork. Correction: Timber must be properly seasoned, free from defects, and treated to resist moisture; using green or warped timber leads to poor finish and structural weakness.
- Misconception: Formwork doesn't need to be designed for lateral pressure. Correction: Wet concrete exerts significant lateral pressure (up to 100 kN/m² for deep pours); formwork must be designed to withstand this without bulging or bursting.
Frequently Asked Questions
Common questions students ask about this topic
Pass / Merit / Distinction Evidence Checklist
How your portfolio evidence is graded for NOCN Know how to erect and strike formwork
Every vocational unit is marked against named criteria rather than an exam percentage. Your tutor's brief lists the exact codes for this unit — here is what each band is asking you to do.
Demonstrate baseline knowledge, accurate terminology, and core practical application.
Provide detailed analysis, structured explanations, and clear workplace reasoning.
Deliver thorough evaluation, original problem solving, and fully justified recommendations.
Before You Start
Prior knowledge that will help with this topic
- •Basic mathematics: ability to calculate areas, volumes, and simple forces.
- •Understanding of concrete materials: mix design, curing, and strength development.
- •Health and safety awareness: knowledge of risk assessments and safe working practices on construction sites.
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Key Terminology
Essential terms to know
- know how to erect formwork to support concrete columns, walls, beams, slab panels and precast units, know how to strike formwork, know how to work efficiently and safely
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