ANSI/BHMA A156.4-2024: Door Closers And Pivots
When slamming, banging doors kept interrupting services in the Boston Trinity Church, Mr. L. C. Norton created the first door closer in 1877. Coil springs and double-swinging…
When slamming, banging doors kept interrupting services in the Boston Trinity Church, Mr. L. C. Norton created the first door closer in 1877. Coil springs and double-swinging…