Safety device for ladders on towers has notched carrier rail on which sleeve, coupled to web belt, rides; if workman slips, fall is less than 6-in.; for snow region installations electric heater system keeps carrier rail free of ice at all times; applications given.
For fixed ladders -- Safety all the way
Safety Maintenance
Safety Maintenance ; 119 , n 1
1960
Article (Journal)
English
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Engineering Index Backfile | 1956
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