Many variables exist in the science of concrete. Different applications and conditions call for a variety of mix designs. Planning your job with our sales and dispatch departments will ensure a smooth and successful delivery of the right concrete for your needs.   · Try to order your concrete delivery at least 24 hours in advance (3 or 4 days for orders of 100+ yards) · When calculating how much concrete you will need, add 10% to account for settling or uneven grades · If you have a difficult area to access, ask your salesperson to visit the site before ordering · Try to let dispatch know the total amount of concrete you will need so that they can plan to have enough mixers available to serve you properly · Give dispatch good, complete directions, including a street address · If you need to change an order after it has been placed, notify dispatch at least 2 hours before the planned delivery time · When giving confirmation on a "will-call" order, call 2 hours before the desired delivery · You are allowed one call-back (clean-up load) on orders of six or more yards, free of charge. If a second call-back is required or a call-back on an order of less than six yards, a load charge of $60 will apply.