ABSTRACT
ART. 10.1. INTRODUCTION M a t e r i a l s such as coal, cement, broken stone, gravel, clinker, wheat, barley, and beans may be stored in bulk in a number of ways. Where ample space is available, the materials may be stored in heaps to their natural angle of repose: this tends to lead to the materials spreading somewhat untidily, and where protection from weather is required may become costly on that account. The pro vision of retaining walls defines the extent of storage, and at the same time reduces the floor area required, making for economy in roof coverage and materials-handling equipment. The extraction of materials in such cases may be by means of excavating machinery (which is expensive to operate), or by conveyors at floor level or in tunnels below the floor (either of which are not entirely effective). Examples of the design of retaining walls for materials stored in this manner are given in Article 8.7.
