Folder entitled 'W D M Deflectograph Drawings Specification'
A folder containing material relating to the specification for a deflectograph machine including a general specification for pavement deflection data logging equipment from W.D.M. Limited, a W.D.M. Limited Deflectograph Specification, a provisional report entitled 'Deflectograph Recommended Equipment for use on British Roads', a letter from the TRRL to W.D.M. Limited containing comments on the systems used on their deflectographs and drawings of various components.
- Open Access