(IV) CURING AND HANDLING POSTS

17. Curing. The posts shall remain in the molds until the concrete has thoroughly hardened and in no event for less than 24 hours after placing. During this time and until they are cured the posts shall be carefully handled and protected from shock. » When the posts are removed they shall be stocked in a nearby vertical position and protected from direct sunlight. They shall be kept wet by sprinkling for eight or ten days after being made. They should be cured for not less than 90 days, when cured naturally, before being shipped or set. Posts shall not be cured out of doors during freezing weather.

(V) MISCELLANEOUS

18. Inspection. All materials and all processes of manufacture shall be subject to inspection and approval at all times. Free access shall be provided for all authorized inspectors to all parts of the plant in which the posts or the materials are made, stored or prepared.

19. Tests. All testing of materials used in the manufacture of posts, all preparing, storing and testing of concrete specimens, as provided in Section 8 hereof, and all screen analyses of aggregates, shall be made in accordance with the methods adopted or approved by the American Railway Engineering Association and in effect at the time such tests, analyses, etc., are carried out. In case the American Railway Engineering Association shall not have approved or adopted any methods for such tests, analyses, etc., the same shall be made in accordance with the methods then adopted or approved by the American Society for Testing Materials.

20. Patents. The manufacturer or contractor shall pay all royalties for the use of patented designs or devices or forms of construction and protect the Railway Company from all claims of infringements or liability for the use of such patents.