Contractors have long been faced with the necessity of placing concrete on inclined planes. However, some modern developments in concrete construction have substantially increased the number of times contractors are likely to be faced with this problem. A few of the concrete applications which might entail this problem include shell roofs, reservoir and tank covers, embankinment stabilization projects, and parking garage ramps. Slump assumes considerable importance in this work. Depending upon the cant of the forms or ground, slump for inclined concrete placement usually varies from 3 to 0 inches. Aggregate gradation curves should be as smooth as possible to facilitate thorough consolidation of the concrete and maintain good workability. This is especially important when top forms are necessary. It is desirable to have as cohesive a mix as possible since segregation can prove a formidable problem in this work. Therefore, air entrainment is usually desirable and thorough aggregate coating is necessary. When placing concrete directly on the ground, for example in embankment stabilization jobs, it should be determined if the problem of reactive aggregates exists in the area in which concreting is to be done. If it does, either Type II or Type V cement should be used and the use of calcium chloride should be avoided. Select a means of transporting the concrete which wll nor result in segregation. Portable conveyor belts have been used for these applications with great success. Power buggies can be used if the formwork is designed to support them. If the area of concrete to be placed is of such magnitude that it will require overtime, make arrangements in advance with the workers and the union for smooth turnover of shifts or continuation of work beyond normal quitting time. If placement operations are likely to continue into the night, adequate lighting and a dependable power supply should be set up before the job begins. Placing concrete on inclined planes need not be a difficult job. If a few special rules are kept in mind and the usual quality concrete procedures are strictly followed, the results will be good. The main points to remember are: (1) plan thoroughly; (2) order and maintain concrete of the proper consistency; (3) start at the lowest point and work toward the highest point; and (4) start curing and protection early and continue for the proper length of time.