Cross Coupler

Cross Coupler is a commonly used connector in construction scaffolding and steel structure erection.It is mainly used to fasten two vertically intersecting rods(such as vertical poles and horizontal bars)and is one of the key components ensuring the overall stability of scaffolding.Its design focuses on the reliability of 90°right-angle connections,and it is widely applied in various construction projects,bridge erection,and temporary support systems.The following is a detailed introduction from aspects such as structural characteristics,performance advantages,application scenarios,and usage precautions:

I.Structural Design:Focusing on the Stability of Right-Angle Connections

The structure of a cross coupler usually consists of two mutually perpendicular semicircular clamps,a connecting bolt,and a nut:

The inner side of the clamp matches the curvature of the outer wall of the steel pipe(adapting to the commonΦ48mm scaffolding steel pipe),ensuring close fit with the rod.

The two clamps are distributed at a 90°vertical angle and connected by a central bolt.When the nut is tightened,the clamps exert radial clamping force on the two intersecting steel pipes,achieving rigid fixation.

Some models are equipped with reinforcing ribs on the edge of the clamp to enhance the overall deformation resistance,especially suitable for scenarios with large loads.

II.Manufacturing Process and Materials

Materials:The mainstream materials are malleable cast iron(such as KT35-10)or low-carbon steel.The former is formed through casting process and has high strength and toughness;the latter is mostly processed by stamping or forging,suitable for lightweight requirements.

Surface Treatment:To improve corrosion resistance,hot-dip galvanizing,electro-galvanizing,or painting is usually carried out,which can effectively resist rust in humid and outdoor environments and extend the service life.

III.Performance Advantages:Ensuring the Stability of Intersecting Nodes

Strong Connection Rigidity:The 90°vertical clamp design ensures precise positioning of the two rods.After clamping,there is no relative rotation or displacement,providing stable node support for the scaffolding.

Convenient Installation:It is fastened by a single bolt,with simple operation.Workers can quickly complete installation or disassembly,improving construction efficiency.

Wide Adaptability:The standardized design makes it compatible with most scaffolding steel pipes(especiallyΦ48mm specifications),and it can be used without additional adjustments.

Moderate Cost:With a simple structure and mature manufacturing process,its price is lower than that of special-function couplers(such as swivel couplers),making it suitable for large-scale engineering applications.

IV.Application Scenarios:Focusing on Vertical Intersection Node Connections

Construction Scaffolding:It is the core connector for vertical poles(vertical direction)and horizontal bars(horizontal direction),used to build the basic framework of construction platforms and bear the weight of workers and materials.

Formwork Support System:In the formwork support for concrete pouring,it fixes the vertical supports and horizontal tie rods to prevent deformation or collapse of the formwork.

Temporary Protection Facilities:Such as protective railings and safety passage frames at construction sites,cross couplers are used to connect vertical poles and horizontal bars to form a stable protective structure.

V.Usage Precautions

Matching Rod Specifications:Ensure that the inner diameter of the cross coupler's clamp is consistent with the outer diameter of the steel pipe(e.g.,Φ48mm steel pipe corresponds to the adapted coupler)to avoid loose connections due to mismatched sizes.

Standardized Tightening Torque:During installation,use a wrench to tighten the bolt to the specified torque(usually 30-50N・m).Too loose a bolt may cause slippage,while too tight a bolt may lead to bolt breakage or clamp deformation.

Regular Inspection and Maintenance:Before use,check whether the coupler has cracks,deformation,or bolt slippage.Timely repaint rusted areas where the surface coating has fallen off;after long-term use,re-tighten the bolts to prevent loosening due to vibration.

Avoid Overload Use:Select cross couplers of corresponding strength grades according to the engineering design load.It is prohibited to replace high-strength forged couplers in heavy-load scenarios.

With the characteristics of simple structure,reliable connection,and appropriate cost,cross couplers have become one of the most used coupler types in scaffolding systems.Their performance directly affects the stability of the entire frame and construction safety.Therefore,strict compliance with specifications is required in selection,installation,and maintenance.