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Formwork Systems in Building Construction Types, Components, and Comparison
What is Formwork? • Formwork is a temporary or permanent mold used to hold wet concrete until it hardens. It significantly impacts the construction quality, cost, and speed.
Key Components of Formwork • • Shuttering – molds concrete • • Centering – supports horizontal forms • • Staging/Props – supports shuttering • • Bracing – prevents movement or collapse
Types of Formwork – Part 1 • • Traditional Timber: Flexible, low cost, but labor-intensive • • Plywood: Smooth finish, moderately reusable • • Steel: High durability, smooth finish, reusable 100+ times
Types of Formwork – Part 2 • • Aluminum (Mivan): Fast, accurate, best for mass housing • • Plastic: Lightweight, ideal for low-cost housing • • Tunnel: Quick cycle, best for box-type buildings • • Slip: Best for vertical structures like silos and towers
Formwork Selection Criteria • • Project scale and complexity • • Repetition and cost efficiency • • Desired surface finish • • Labor skill availability • • Construction speed
Formwork – Best Practices • • Ensure proper alignment to avoid defects • • Apply form oil for smooth de-shuttering • • Clean joints and seal gaps • • Ensure strength to withstand concrete loads