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Recent content by Fuzzy

  1. Fuzzy

    Steel Deck Buckling with Loadbearing Precast

    It appears that the problem is related to the temp when the deck was completely welded. Decking areas which were welded in hot weather have not had the same problems as buildings which were welded at a colder time. The decking which was rewelded in hot weather has not seen any further popping.
  2. Fuzzy

    Steel Deck Buckling with Loadbearing Precast

    The welds are popping where the deck runs parallel to the precast. The support angle is continuous with welded splices (600' long). The popping is occuring in about the center of the outer bays (40' bays).
  3. Fuzzy

    Steel Deck Buckling with Loadbearing Precast

    The roof is divided in half with an expansion joint. Each half is roughly 600'x500'.
  4. Fuzzy

    Steel Deck Buckling with Loadbearing Precast

    We have a large (500,000sqft) warehouse with loadbearing precast and steel decking. In areas where the roofing has not been completed along the outside edges, we are seeing the metal deck welds popping due to the thermal expansion of the deck. It would appear that the precast is holding the...
  5. Fuzzy

    Sodium Hypochlorite Residual Readings all over the board

    Hydrae The pump has a suction lift of about 5'-6' straight to the pump. It has auto bleed/degassing feature and will automatically switch-over on flow sensor failure. To date we have not had a loss of prime to cause the system to switch-over. The piping arrangement starts with foot valve...
  6. Fuzzy

    Sodium Hypochlorite Residual Readings all over the board

    Check system again, was operating moderately stable then simply dropped off the chart very quickly. My thoughts are that the piping arrangement is allowing any offgassing to build up at the high point. Then when the gas bubble is large enough it will be forced to "pass gas". Therefore, during...
  7. Fuzzy

    Sodium Hypochlorite Residual Readings all over the board

    We reduced the concentration by mixing 12% 50/50 with water and increased system backpressure to 40psi in attempts to reduce the gas bubbles. The piping arrangement is highly susceptible to air entrampment (up, down, underground and back up). Hydrae your point about the snubber tank to smooth...
  8. Fuzzy

    Sodium Hypochlorite Residual Readings all over the board

    We are switching over an existing Calcium Hypochorite system to new sodium Hypochorite system and when we switch over the chlorine readings at the analyser go all over the board 0.2mg/L to 10mg/L. We had the reading relatively stable for about a week (1.2 to 1.7) but not as stable as when using...
  9. Fuzzy

    Pipe Pile Driving

    I have to qualify the reference to the thickness of the till layer. The soils consultant stopped taking samples when he initiated DCPT testing. Up to that point the soil was silt/silty clay. So silt/silty clay may extend farther before till layer (assumed based on experience). DCPT numbers...
  10. Fuzzy

    Pipe Pile Driving

    A little more information on the site. The site is in Northwestern Ontario. The underlying clay layer is considered low to medium plasticity, average 30% moisture content, therefore subject to future consolidation under loading. Experience on the same site has seen numerous pile tests driven...
  11. Fuzzy

    Pipe Pile Driving

    We are looking at project that specifies an 8" pipe pile driven closed end. The stratum is generally silt and clay with SPT values of between 2 to 12 (blows) about 120 feet thick. Then there is what we believe is a dense till layer, 30 feet thick, overlaying shale bedrock. The testing...
  12. Fuzzy

    Culvert Jacking/Tunneling

    I am looking for information for equipment and technical information for jacking or tunneling. I have not had much luck in finding construction technics/details for this type of installation. Anyone with useful resources; books, web sites, equipment suppliers, would be greatly appreciated. Am...
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