Updated edition of Manual 49, User’s Guide to ASTM Specification C94/C94M on Ready-Mixed Concrete, 2nd Edition, is available in print and online. Its 22 chapters explain every aspect of ASTM C94: ordering, production, and delivery of ready-mixed concrete. Manual 49 provides tips and advice and has numerical examples, photos, and figures to illustrate proper procedures and implications when C94 is cited in project specifications.