Overview
The Reinforced Monolithic Steel Bar Stool is an engineered support device widely used in modern concrete construction. Unlike traditional wire stools, this monolithic design offers superior stability and load-bearing capacity for reinforcement mesh positioning. Developed to meet demands for high-precision slab construction, these stools are manufactured through automated bending processes from continuous steel bars, ensuring consistent quality. Their adoption has significantly reduced rebar settlement issues in projects requiring strict elevation tolerances.
Structure and Working Principle
The stool features a symmetrical three-point support structure with a central arch and two grounding legs. The monolithic construction eliminates weak joints found in welded alternatives, achieving 20-30% higher load ratings. During installation, workers place the stools at 600-1000mm intervals beneath the upper rebar layer. The arched design distributes vertical loads evenly while maintaining minimum concrete cover thickness as specified in structural drawings. Advanced versions incorporate anti-slip notches for enhanced mesh stability.
Key Features
1. High durability: Made from 6-10mm diameter steel bars with yield strength ≥400MPa, supporting up to 150kg per stool. 2. Corrosion protection: Hot-dip galvanized or epoxy powder-coated variants available for projects in coastal or chemically aggressive environments. These coatings extend service life by 3-5 times compared to bare steel. 3. Standardized dimensions: Manufactured in heights ranging from 15mm to 120mm to accommodate various slab thicknesses, with tolerances within ±1mm.
Application Areas
Primarily used in cast-in-situ concrete floor slabs for commercial buildings, parking structures, and industrial facilities where rebar positioning accuracy is critical. Special applications include: 1) Suspended slab edges requiring extra support against deflection, 2) Post-tensioned concrete floors where stool height must accommodate tendon ducts, and 3) Hospital/laboratory slabs demanding vibration resistance during concrete pouring.
Maintenance and Precautions
Requires minimal maintenance but demands proper storage: keep in dry conditions if pre-coated, and avoid stacking heights exceeding 1 meter to prevent deformation. Critical precautions include: 1) Never modify stool height by bending on-site, 2) Reject units with visible cracks or coating damage exceeding 5% surface area, and 3) Ensure concrete workers step between stools, not directly on them, during pouring operations.
B2B Procurement Guide
For bulk purchases (10,000+ units), request mill test certificates validating material grade and coating thickness. Reputable manufacturers provide batch traceability. Key negotiation points: 1) MOQ discounts (typically 50,000+ units for best pricing), 2) Custom packaging for automated dispensing on large sites, and 3) Third-party inspection rights for random load testing. Lead times average 2-4 weeks for standard sizes, longer for custom orders.
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