6.9.1. The following provisions shall be respected during deforming:(a) during construction, shoring shall remain in place for 21 days, unless an engineer delivers an attestation establishing that the cement has attained sufficient strength to support its own mass and the loads that it may have to support;
(b) forms shall be removed progressively by section:i. by taking care to place one’s feet on a steady support;
ii. by taking care not to damage the concrete elements; and
iii. by proceeding continuously ahead and foreseeing a free exit path in case of falling objects;
(c) in the case of building framework, the columns shall be deformed first; and
(d) the forms under the slabs and those on the side of the beams and arches shall be removed before the shoring of the beams and arches.