10/23/1985 - Laserfiche WebLink

Home Browse Search

someone being able to change the things that are specified willy-nilly. Mr. Lastovica explained that it was first envisioned that the windows would have been precast off site by someone like Florida Prestress and that spec would have applied towards them. Mr. Lastovica agreed that there probably should have been some discussion before the windows were actually cast on site as to what the actual concrete strength was. Commissioner Scurlock asked about the columns, and Engineer Lastovica stated that was a mistake. They were to have been poured with 4,000 p.s.i. concrete; however, the mix design they did use came up to an average tolerance of 3600 p.s.i, which is acceptable; that was at 28 days and as the concrete continues to cure they will increase in strength. Commissioner Bird inquired about the difference in cost between 3,000 p.s.i. concrete and 5,000 p.s.i. and was informed it is about $1.75 a cubic yard. Commissioner Bird noted that could make a substantial difference in the overall cost, and Engineer Lastovica agreed it would if it were used throughout, but he believed only about 5 yards have been poured. Commissioner Bird asked if 5,000 p.s.i. was specified throughout, and Engineer Lastovica advised that it was only specified for the windows. Commissioner Scurlock next inquired about the necessity for tying rebars as he felt this had not been done, and the Engineer advised that the type of masonry construction being used is considered "low -lift" grouting, and with that method there isn't a critical need for tying the rebar. When you get into "high -lift" grouting, about 121, you can't control the placement of the bar. Commissioner Scurlock next asked about using lesser specified rebars, and Engineer Lastovica stated that was a mistake in his drawings; unfortunately he called fora #5 bar 25 OCT d �� BOOK 62 FACE 474