There'll be a 12" square precast prestressed concrete pile embedded 20 ft or so into the soil, and sticking out 13 feet or so above grade at each end of the 50 feet long floating debris screen. The debris screen will attach to a sliding anchor point mounted to the face of the pile, which will...
Below is a link to the debris screen that we'll be placing at least 10 feet away from the open end of the pipe outfall. The screen is 4'-0" tall, and floats on the water surface by use of floats along the top portion of the screen. It is anchored to precast piles at each end of the screen. As...
I'm not following how water moving at 10 ft/s won't have a pressure as is exits the pipe. I'm designing a support structure for debris screen that is approximately 10 ft away from the end of pipe, and I'm trying to determine the pressure/force the exiting water will exert on a clogged debris...
It's near the Baltimore area, and is up a tidal river a bit. In the spec that was provided for Bidding, Type V was specified. Now the contractor is submitting a mix design to meet the spec criteria and is saying he cannot get Type V cement. I'm hearing that they may cast this off site and...
I have a project where we are placing a concrete slab (10'x3'x2') within brackish water (Chesapeake Bay area) to act as an anchor point for a Water Treatment Plant's outlet piping diffusers. Originally, it was specified to use Type V cement in the concrete mix. The contractor states that they...
Has anyone had success with requiring the Pre-Engineered Building Manufacturer to design their building for the Blast Requirements of UFC 4-010-01? The building's current conceptual design does not allow for all building components to fall within the Assumed Parameters of Table 2-3 (i.e. main...
Does anyone know if RSMeans CostWorks has line items for professional design services? I would assume that it'd be a line item based on type and square footage of building, or a percentage of the estimated construction cost. Thanks.
Does anyone know where we can find design information for what is contained is wash water from washing Black Hawk helicopters. We are installing a new wash rack for the Army National Guard and need to know what the treatment equipment needs to be designed for before outletting to SAN line.
I was asked by a contractor how much area would a ton of DGA cover at a 4" depth? I don't have any experience with DGA, but to me it's more of a mathematical question regarding densities and volumes. It is that simple, or are there formulas for these characteristics associated with DGA?
I'm designing a 2-story structure with exterior ICF bearing walls. The ICF manufacturer (with Contractor ties) is requesting we keep all lintels within coursing of their 16 7/8" high ICF wall blocks. I have a few spans over 1st floor windows that have floor beams from the 2nd floor bearing...
Does anyone have experience with connecting 20 gauge galvanized roof deck to heavy timber trusses? The major concern is excessive corrosion from the galvanizing/pressure treatment interaction. I've been told to spec a screw with a stalguard coating, but Elco does not have shear or pullout...
Does anyone know of any IBC 2006 design load requirements for special indoor equipment that will be hung from the roof structure of a classroom? I need to design for therapy swings in a special needs classroom, but I can't find much information on the design requirements. I was thinking of...
We're starting to design a new school that will obtain a LEED Silver (or higher) rating. My question is what proportions/requirements for slag, fly ash, etc. are typically specified for concrete mixes in the 3,000 to 5,000 psi range? I would like to contribute to the LEED credit as much as...
My department is trying to verify that we are using industry standards in our fiber-reinforced concrete slabs on grade, stairs and sidewalk typical details/specs. Can anyone point me in the right direction for latest standards and practices? Thank you
