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  1. Chili91

    Septic Sand Mound pump selection

    Designing a sand mound septic system in an area of high clay soil with low perc rates. I am having trouble finding a pump curve to match my design - 10' Head and 20 gpm or so. Also, should I spec a grinder pump? The pump will be handling effluent from the septic tank so in theory there should...
  2. Chili91

    Common metric pipe sizes for RCP?

    I am doing a project in metric units and I want to spec pipe sizes that are common - for example - an 18" pipe is close to 450mm but is 500mm more common? The project will probably get materials from Eastern Europe. I'll probably use RCP or HDPE as the soils are highly corrosize. Thanks for any...
  3. Chili91

    storm drain settlement problem

    The patio is only six years old - no settlement data is available other than observing the subsidence relative to the building - which is on piles. The exterior patio walls consist of planters, raised 2' or so above the paver surface, built of segmental blocks, and heavily landscaped. No...
  4. Chili91

    storm drain settlement problem

    Hand auger borings in the patio consisted of a sand leveling course for the pavers underlain by geotextile fabric underlain by 2-4 feet of sand/clay/gravel. Underneath is old fill - the site is on reclaimed land. Even though the patio has sunk 6-8 inches, the patio walls, accessible sidewalk...
  5. Chili91

    storm drain settlement problem

    I am designing a fix for a 5,000 s.f. or so patio in a flood plain. The patio is built up 3-4 feet above the ground and is settling relative to the adj building (which is on piles) about 6-8 in. The patio surface is brick pavers - which I can remove and regrade, but there are two problems: 1)...
  6. Chili91

    Repair of asphalt overlay on concrete warehouse slab

    Need some advice on repairing a cracked/chipping/spalling asphalt overlay on a concrete slab inside a very large warehouse. The building is 50+ years old, not sure how old the asphalt overlay is. Should I make an attempt to repair the asphalt, or rip it all up and overlay with a thin epoxy...

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