Adjustable Steel Prop

Adjustable Steel Prop,also known as telescopic steel shore or adjustable steel strut,is a critical vertical load-bearing component widely used in construction,infrastructure,and industrial maintenance.Its defining feature is the telescopic design,allowing height adjustment from 1.2m to 4.8m—adapting to diverse scenarios like high-rise floor formwork,bridge beam support,and prefabricated component bracing.Unlike fixed steel props,it solves the challenge of uneven ground or variable structural heights,ensuring stable load transfer(concrete self-weight,construction equipment,and live loads)to the ground,making it indispensable for both temporary and semi-permanent support needs.

Structurally,it adopts a robust two-section or three-section telescopic structure optimized for strength and adjustability.The outer tube,made of Q235 or Q355 carbon steel(yield strength≥235MPa),has a diameter ofΦ60mm toΦ89mm and a wall thickness of 3.5mm to 5mm—providing the main load-bearing capacity.The inner tube,with a smaller diameter(Φ48mm toΦ76mm),slides inside the outer tube and features evenly spaced adjustment holes(10mm to 15mm apart)for precise height setting.At the top of the inner tube,a square or circular top plate(100×100mm to 150×150mm,thickness≥6mm)is welded to distribute loads evenly,preventing damage to the supported structure(e.g.,formwork panels or steel beams).The locking mechanism,a spring-loaded pin or high-strength bolt,inserts into aligned holes of the inner and outer tubes to fix the height;heavy-duty models(for loads≥35kN)add a locking nut to prevent slippage under vibration(e.g.,concrete pumping).The bottom of the outer tube is fitted with a base plate(diameter/side length≥150mm,thickness≥5mm)to expand ground contact area,reducing ground pressure to≤20kN/m²and avoiding sinking into soft substrates.

Classification of Adjustable Steel Props is based on load capacity and height range.By load:Standard props(≤20kN)for light-duty tasks like residential floor formwork(100mm-150mm thick concrete);medium-duty props(20kN-35kN)for commercial building beams or slab formwork(150mm-250mm thick concrete);heavy-duty props(≥35kN)for large-span bridges,industrial workshops,or prefabricated concrete components(weight≥5 tons).By height:Short props(1.2m-2.5m)for low-rise buildings or interior renovations;medium props(2.5m-3.5m)for standard-height commercial floors;long props(3.5m-4.8m)for high-formwork systems(e.g.,stadium ceilings or factory mezzanines).

Key applications span multiple fields.In construction:It supports concrete formwork for beams,columns,and slabs during curing,ensuring structural alignment and preventing deformation.For prefabricated construction,it braces precast walls or panels during installation,holding them in place until permanent connections are made.In infrastructure:It aids bridge repair by supporting deck segments during replacement and stabilizes tunnel linings during shotcrete application.In industrial settings:It supports heavy equipment(e.g.,generators or conveyors)during maintenance and reinforces factory steel structures(e.g.,roof trusses)during expansion.

Safety use is critical to avoid accidents.First,match the prop to the calculated load—never overload(e.g.,a 20kN prop cannot bear 30kN).Second,ensure proper installation:Vertical props must be plumb(verticality deviation≤1°)to prevent eccentric loading;base plates must rest on solid,level ground(use a 200×200mm steel pad on soft soil).Third,secure the locking mechanism:After adjusting the height,confirm the pin/bolt fully inserts into the holes and tighten the locknut(torque≥30N·m for heavy-duty models).Fourth,inspect before use:Check for cracks in tubes,bent inner/outer tubes,worn pins,or rust(rusted area>10%means scrapping).Finally,avoid lateral loads—props are designed for vertical use;lateral forces may cause buckling.

With its adaptability,strength,and ease of use,the Adjustable Steel Prop remains a staple in modern construction,balancing efficiency and safety for diverse support needs.