How far (span length) have you pushed the Type IV's. At that span length what was your spacing. Was it spongy (excessive deflections?)under heavy traffic.
I'm curious as to what lengths have been constructed. Would the old beam dept to span ratio of 1/25 apply?
Thanks, Tincan.
I have an interior basement where the walls and columns have severe spall/fracture due to salt contamination/rusting of the re-bar in the walls and the WF's in the columns. The concrete covering for the WF columns are fire protection and have no structural capacity.
The walls are fillers, no...
I have an open channel between 2 fixed elevation RCB's. To connect these two I can use a drop structure or a slope of 1.33% which produces high velocities. Has anyone roughened the interior of an RCB, sandblast or water pressure on setting concrete to obtain a higner "n" value?
Would have to...
I have a spread sheet for the design of reinforced concrete boxes with the following apprition:
1. There are no macros assigned to or developed within the spreadsheet.
2. At the beginning/opening of the program there is no macro inquire pop-up (enable/disenable the macro).
3. At various cells...
1992 AASHTO Sec.17.6.4.3 provided that "The width of top slab strip used for distribution of concentrated wheel loads may be increased by twice the box height for the distribution of loads to the bottom slab."
1994 AASHTO Sec.12.11.2.2 provides that "The width of the top slab...
I have written/developed an Excel spread sheet for the solution of prestressed concrete beams(PCBs) for bridge use updated to AASHTO LRFD(1994). I have used it successfully and it compares very favorably with programs used by the local DOT. However, I have not been able to find a local...
