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MAP20071018418Lahey, James W.Keeping them up in the air safely / by James LaheySumario: Ladders and scaffolds are basic to plant maintenance. All should conform to appropriate safety code provisions. This article treats: when selecting one of the three types of ladders (wood, reinforced plastic, or metal); the safe use of ladders first calls for two types of inspection; maintaining ladders is a safe practice; scaffolds and scaffolding; mobile tubular scaffolds, both frame and folding sectionalEn: National safety news. - Chicago. - Vol. 127, nº 2, February 1983 ; p. 32-351. Seguridad e higiene en el trabajo. 2. Accidentes de trabajo. 3. Prevención de accidentes. 4. Escaleras. 5. Escaleras móviles. 6. Mantenimiento. I. Title. II. Título: National safety news.