Universal Portland Cement Co., C. W. Boynton · Universal Portland Cement Co. · leaf 20
ucted fills and poor sub-bases result in a great many defectivewalks. Typical examples of such defects are shown in Figures7, 8 and 9. It is true that a crack through the center of a walk maynot necessitate its rebuilding, but when it is understood that per-fect walk can be obtained with so little… … Figure 7. Crack through center of a 6 foot walk, resulting from poor foundation. Preparation of Sub-Grade. As walks seldom rest uponthe top of the ground, it is usually necessary to prepare thesub-grade upon which the sub-base or foundation is established.This is done by either of the two methods…
