cat ladder


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cat ladder, duckboard, gang boarding, roof ladder

cathedral: plan of Wells Cathedral. A, apse; B, altar; D, E, eastern transept; F, G, western transept; H, central tower; I, J, western towers; K, north porch; L, library; M, western doorway; N, N, western side doors; O cloister yard; P, Q, north and south aisles of choir; S, S, east and west aisles of transept; T, U, north and south aisles of nave; R, R, chapels; V, rood screen; W, altar of lady chapel
A plank with a series of small strips nailed across it; hung on a sloping roof under repair to provide a footing for workmen and to protect the surface.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
The system enables centralised collection of waste product, therefore removing any health and safety issues of machines being moved by personnel up and down vertical cat ladders. Up to 198 metres of pipe work and fittings were installed, interconnecting 18 hose connection points, serving 6 internal day bins 4 above and 4 below with a final point in front of the BVC static industrial vacuum cleaning machine located elsewhere.