CHAPTERII, SECTION 3 In order to provide stability, the bents were braced in pairs and to one another and rested on spread footings which extended down to and were doweled into the coral to prevent settlement and lateral movement. In order to establish and maintain the necessary pipe alignment, adjustable roller and fixed supports provided vertical and horizontal adjustments with the mean position set for the established level of each support. Expansion and contraction of the pipes and the manifold in the mirror house, due to temperature and pressure changes, were compensated for by using all metal expansion joints. Figure 2-86. Station 1524 Under Construction Figure 2-87. Page 2-98 The vacuum pipes led to the 24” manifold in the mirror house from which 16” lines led to six User-furnished vacuum pumps and one roughing pump. The pumps were capable of maintaining a 0.1 micron vacuum. Cooling water Station 1524 - First Row of Steel Pipe Supports Erected