PN EN 1804-1 : 2004 + A1 2011
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
MACHINES FOR UNDERGROUND MINES - SAFETY REQUIREMENTS FOR HYDRAULIC POWERED ROOF SUPPORTS - PART 1: SUPPORT UNITS AND GENERAL REQUIREMENTS
31-05-2021
12-01-2013
Describes the safety requirements for hydraulic powered roof supports concerning: construction, accesses, protection against dust and face material spalling, materials, loading and requirements for tests and marking.
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