Recent content by EIT9667

I work on a number of land development projects in local municipalities. Typically there is a municipal engineer (licensed P.E.) who must sign off on any plans on behalf of the municipality. He also can dictate or approve designs/changes to the plans for components in the municipal right-of-way...

I'm looking for a good explanation on why open structure drywells do not freeze during the winter. I work in the northeast where typically it is assumed frost depth is around 4'. For stormwater infiltration basins we are required to install drywells (typically concrete drywell structures...

yes CB is new. Watermain is running parallel to the curb and the CB needs to be installed at the low point along the curb. Have already pushed the CB back and added a jog in the curb to get it away from the waterline the 2'. My question is would a 12" waterline serving that number of homes be at...

this is for a watermain with a catchbasin in close proximity (2' away). 2" insulation board is being put between the structure and watermain as a precaution to prevent frost impact/freeze. However, municipality has requested analysis of how long it will take for pipe to freeze. For simplicity...

I need to determine how long it would take a 12" DI waterline to freeze. Water = 40 degrees. Surrounding = 0 degrees. Conservatively assuming no flow.

I am looking for information regarding a recent update to EPA Part 280 (Underground Storage Tanks). I was told that Part 280.418 changed the testing requirements for USTs without leak detection systems from yearly tests to monthly tests. This was a recent change, July or August of this year but...

I am designing a cantilever retaining wall using an equivalent soil lateral load of 35 psf per ft depth (instead of finding active earth pressure using coulombs method) Should equivalent soil lateral load be in lb/ft per foot depth to design? I'm not sure if i need to convert this or if the soil...

Thanks, any idea where i might be able to find something that will define that?...i'm surprised that the manual doesn't define it anywhere...or is that because it is assumed to be obvious from the figure? I've only found ws to be the size of fillet weld or col stiffener width in other sources...

Is this just the distance from the edge of the cut out to the edge/corner of the diaphragm plate?

I am trying to figure out what the 'ws' variable is in the HSS Diaphragm Plate Connection Figure 12-22 on page 12-27 of the AISC Manual (13th Ed.) It doesn't seem to be defined anywhere else in the manual.