So we laugh, and say put it in per design. 7.3 Cutting Duct Use a fine tooth wood saw to cut conduit.

So we have them quantify the amount the owner will save, and it invariably comes out to $5000 or $10,000. 7.2 Common Trench Other utilities sharing a common trench with NSTAR ductbank shall not be enveloped within the same concrete formed encasement, but shall be separate from our encasement and a minimum clearance of 12 inches away. Side note: Whenever we have a VE (Value Engineering) phase on a project, the first thing the contractor wants to eliminate is duct bank reinforcing. There's no real design, but I have used the reinforcing to span the duct bank over a temporary trench. They're reinforced with #4's around the perimeter at 12 inch spacing and #4 ties at 24 inch centers. There's a lot of casual concrete (waste concrete, thrust blocks, foundation extensions, etc.), but if the backhoe operator sees red, he's been warned. There's a lot of reasons that don't hold up to close examination, but bottom line is, that if you're in a water or wastewater treatment facility, you're likely to be digging a trench through it or a hole into it. Choose the rectangular chain of ref.lines and the main path and click Create Solid Form.We reinforce electrical duct banks and require them to be red. Firs we need to create a rectangular sweep with the main encasement shape. They often are concrete encased to prevent future. They also help support the conduits to prevent slumping / bowing, reducing friction caused when pulling the telecom, utility, and power line. Now, one we have our two (adaptive)point spline with a rig on one of the point which hosts profiles for future sweeps we can start creating forms. Duct Bank Spacers are used to maintain conduit spacing during installation of underground telecommunications, utilities, and power lines (duct banks). Whatever, as a result by making my encasement family alined to the top right or top left duct center will enable me to draw this element from the plan view by just tabbing and snapping to the desired pipe center. Moreover, not all the ducts banks have a duct running right on the center, for example in our case it is 4 ducts, however if it there were 5 ducts we could use the center one as an insertion/alignment. This is because in Revit MEP when you place a pipe or conduit and you use parallel pipes or ducts tool, usually you draw the parallel pipes from one side to another and it's always easy to snap to one side element rather than center. However, at the manhole structure, both the counterpoise and the (airports) bare cu conductor are bonded in the same way. The 82' depth is likely the maximum frost depth over a hundred year record period. At no point along the duct bank is the cu conductor bonded to ground rods like the FAA counterpoise system. Only frost heave beneath the duct bank will. Soil frost heave above the bottom of the concrete will not affect the ductbank. As you may have noticed in the illustrations I have made my rig aligned to the center of one of the side ducts. Typical concrete-encased duct bank detail highlighting the evaluated design considerations outlined in this article. thanks again, FWIW, in the design of concrete-encased duct banks, it is the depth of the bottom that is of the most concern.

CONCRETE ENCASED DUCT BANK DETAIL FAA