Avoid pitfalls in steel formwork construction: Remember these key details and tips
Steel formwork is the "framework" for concrete shaping. Detailed control during construction directly affects project quality and formwork reusability. Many construction teams ignore minor issues, leading to hidden hazards such as slurry leakage and deformation. Mastering these practical tips can effectively avoid pitfalls.
Dec 02,2025
I. CLEANLINESS IS THE FOUNDATION YET EASILY OVERLOOKED
If concrete residues solidify on the formwork surface, they will cause uneven surfaces of the next-poured components. It is recommended to clean with a scraper combined with a high-pressure water gun after construction. For oil-contaminated areas, wipe with organic solvents such as acetone. Residues in gaps must be thoroughly cleaned with a steel wire brush. Dry promptly after cleaning to prevent rust recurrence.
II. SEALING AND REINFORCEMENT ARE CRITICAL IN THE INSTALLATION STAGE
Formwork joints are prone to slurry leakage—seal them with 20mm-wide double-sided adhesive tape, and compact especially at corners and connection parts. The support system shall be scientifically arranged according to the span: for example, beam formwork with a span ≥4m shall be cambered at 1/1000-3/1000, and the spacing of column formwork hoops shall be controlled within 500mm to prevent formwork bulging and deformation during pouring.
III. SELECTION AND APPLICATION OF FORMWORK RELEASE AGENT REQUIRE CAUTION
Prioritize water-based products, apply evenly without missing spots, and avoid contaminating steel reinforcement. In case of rainfall during construction, cover the formwork promptly. Conduct subsequent operations only after the formwork is completely dry after rain to prevent paint peeling and reduced adhesion. Though these details are minor, they enable steel formwork to perform better and improve construction efficiency.
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