CHAPTER Ii, SECTION 1B sive strengths and unit weights obtained on was inspected to insure a well-compacted, and sults of all the limonite concrete test cylinders show that an average compressive strength of 3259 psi was obtained at ages of 28 days. The inplace unit weights of limonite concrete structures were checked by carefully calculating the capacity of the forms and comparing the volume with the number and weights of all batches of concrete going into a particular pour. Very close or exact agreements were obtained hetween the unit weight of the mix design and the calculated in-place weight. Figure 2-25 shows a foundation for a Scientific Station. At the right has been spection after placement, removal of forms and the limonite concrete pours were good. The re- -~ywWe é aaa[ee x3 well-bonced and smooth, dense concrete. In- backfilling was likewise continuous. With the structure formed, inspection on electrical, sani- tary, mechanical, piping and similar work fol- owed, As to deviations, the very existence and surveillance of active inspection was a deterrent to careicss workmanship, particularly since it was bacxed by top management and respected by supervision. Its chief function thus became a reporting agency to the superintendent, who rectified unsatisfactory conditions directly and promptly. Authority of the inspectiun service to correct deviations from plans and specifications was not, however, limited to this level. If conditions were not rectified, the Resident In- spector would notify the Chief Inspector who would refer the matter to the Resident Engineer. The Resident Engineer would then investigate and recommend action to be taken by the project Manager. His discretion was used to expedite construction and insure integrity of the work not only by entorcement of remedial measures, but also by adjusting to material shortages and functional changes byeffective and controlled substitution. Safety inspection was assigned as an additional duty to all Field Inspectors. The Safety Engineer gave all inspectors a series of safety lectures defining the required safety stanFigure 2-25. Limonite Blast Wall for Station 1342 poured a regular coral concrete pour. The reinforcement shown is for limonite concrete and this reinforcement must be continuous. In order to remove the forms for the regular concrete, an opening was burned out as shown in the center. With the forms removed, the reinforcing bars were replaced over the opening and welded ii place. FIELD INSPECTION. The Field Inspection Section inspected all phases of construction work from the first clearance and grading until final completion and acceptance. The preliminary work consisted of studying plans and specifications, bills of materials and any special conditions. Materials were then checked for conformance with specifications and adequacy of amounts on hand and available. The procedure of work, manpower and equipment to be used was usually decided in conference with the work superintendents involved. With the commencement of work, inspection was contin ious. Excavatiuns and foundations were inspect: 4 for location, dimensions and orientation; form: were checked for adequacy; reinforcing rods were checked for size, bends, spacing, ties and rgidity of support; embedded fixtures were ch cked for location and size. The placement of concrete Page 2-50 dards, cperating practices and working condi- tions. He also issued to them various types of salety raanuals, especially in regard to safety Practices in construction, vehicles and job hazards. Jobsite procedure provided that inspectors could hold up work on a project if unsafe practices were involved, until the unsafe conditions Were rectified. With work being undertaken at so many sites and locations, and in order to have uniform standards, detaiied prucedures were set up in Tegard to: 1. Approval of construction changes. 2. A weekly construction progress report noted the percentage of completion of all outstanding work orders and completion dates for same. 3. Weekly inspection narrative report, a condensed summary of pertinent mspectyon items noting the difficulties, delays and other factors affecting the progress of the work. 4. Inspectors’ ‘‘as-built” corrections, the procedure to be followed in maintaining prints in an up-to-date condition and marking all vanations. 5. Concrete design mix, specifying to Construction the amounts of the various