👉The Main pre-requirements and safety issues for formwork in high-rise buildings

🚧1. Pre-requirements for Formwork (Before Installation)

❇️A) Approved Design & Drawings
⏺Formwork shop drawings approved by engineer
⏺Checked for loads: fresh concrete, workers, equipment, wind Proper details for props, ties, bracing, and connections

❇️B) Qualified Personnel
⏺Formwork erection supervised by experienced engineer/foreman Workers trained in formwork handling and safety

❇️C) Material Inspection
⏺Formwork materials free from: Cracks, deformation, corrosion
⏺Damaged plywood or bent steel props
⏺Adequate load capacity for high-rise floors

❇️D) Proper Planning

⏺Formwork sequence and stripping time planned
⏺Concrete strength gain verified before removal Crane lifting plan prepared

❇️D) Stable Base

⏺Props placed on solid ground or slabs Use of sole plates/base plates under vertical props

🚧2. Major Safety Issues in High-Rise Formwork

❇️A) Risk of Collapse (Most Critical)

💫Causes:
⏺Insufficient bracing
⏺Early removal of props
⏺Overloading with materials

💫Safety Measures:

⏺Follow design strictly
⏺No removal without engineer approval

❇️B) Fall from Height

⏺Workers exposed at slab edges and columns

💫Safety Measures:

⏺Guardrails and edge protection
⏺Safety harness with lifeline Proper access (ladders, stair towers)

❇️C) Improper Shoring & Reshoring

⏺Lower floors may fail if reshoring is ignored

💫Safety Measures:

⏺Continuous reshoring transfer checked floor by floor

❇️D) Lifting & Handling Hazards

⏺Crane lifting of panels at height

💫Safety Measures:

⏺Certified lifting points Tag lines used
⏺No workers below suspended loads

❇️E) Concrete Pouring Pressure

⏺Fresh concrete creates horizontal and vertical pressure

💫Safety Measures:

⏺Controlled pouring rate
⏺No overfilling in one location
⏺Continuous monitoring during pour

❇️F) Weather Effects

⏺Wind load critical in high-rise buildings
⏺Safety Measures: Extra bracing at height
⏺Stop work during strong wind or rain

🚧3. During Formwork Installation

⏺Check vertical alignment of props
⏺Ensure tight connections and locking pins
⏺Keep working platforms clean and non-slippery
⏺Adequate lighting for night work

🚧4. Before Concrete Pour

💫Engineer & safety officer inspection Confirm:
⏺Bracing complete Props tight
⏺Openings covered Permit to pour issued

🚧5. During Stripping

⏺Remove only after required concrete strength achieved
Follow top-down or approved sequence
⏺Do not remove load-carrying props early Barricade stripping zone

🚧6. Key Safety Checklist

✔ Approved formwork design
✔ Strong bracing & reshoring
✔ Fall protection system
✔ Safe lifting practice
✔ Proper supervision
✔ No early removal
✔ Regular inspection

@etconp