steel ball joint handrail *full range in type&dimension *largest ... to deck, platform, walkway and roof and edge 1) Ball-joint rail have advantages such as attractive appearance, convenient ... construction engineering fields as electric power, petrochemicals, machinery, sewage treatment plant, waterworks, gardens, municipal roads, airports and wharfs. 2) ... .5(38.1)26.8(32.0) steel ball joint handrail