Dip tank covers shall comply with the following:
(a) Covers shall be arranged to close automatically in the event of a fire. Such tank covers shall also be arranged for manual operation.
(b) Covers shall be constructed of substantial noncombustible materials or if of the tin-clad type, the enclosing metal shall be with locked joints.
(c) Chains or wire rope shall be used for cover support or operating mechanism.
(d) Covers shall be kept closed when dip tanks are not in use.
(Prior code § 129.1-71)