What is the Differences of BS1139 EN74 Class A & B Scaffold
How to Choose Standard for Different Construction ?
In Scaffolding Industrial, Scaffold Tube and Fitting System are still very Popular For Its Economy Cost Than System Scaffold, Flexible Shape Assembly, and High Safety Load Capacity.
We have BS1139 Standard and EN 74 British Standard in Construction Scaffolding Pipe and Fitting System, Those Are The Most Using Scaffolding Standard Not Only For Traditional Civil. Residential and Building Construction, But Also Industrial Scaffolding, Commercial Scaffolding Globally and Internationally.
We can see BS1139 and EN74 standard Popularly Mentioned in Construction and Engineering.
BS 1139 Standard is a standard suit for scaffold tubes and pipes. But it is also a standard with a requirement for all types of scaffolding couplers, including drop forged double coupler, pressed double coupler, forged swivel clamps, pressed swivel clamps, putlog scaffold coupler, board retaining coupler, sleeve coupler.
En74 standard is a standard for scaffolding couplers only. It is used mostly for double and swivel coupler, sleeve coupler.
The requirement on scaffold couplers are same as BS1139. But there are EN74 Class A and Class B.
EN74 Class A is a initial standard requirement on Slip, Distortion, and Other Characters to ensure safe construction.
While EN74 Class B is a higher standard requirement, that distortion requirement is much higher than EN74 Class A and safer for heavy-duty construction loading construction.
For Drop Forged Double Coupler, EN74 Class B is always requirement by Oil Gas Companies
While Drop Forged Swivel Coupler, EN74 Class A is accepted by Oil Gas Companies.
Construction Projects Using OD48.3×4.0mm Scaffold Tube Class Material, better Choosing Drop Forged Scaffolding couplers. While OD48.3×3.2mm Scaffold Tube Material, Both Drop Forged or Pressed Steel Scaffolding Couplers are good choices.
On Water Project, should using hot-dip galvanized drop forged couplers for a durable reason. E-galvanized Scaffold Couplers are economy but easier rusty.