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Recent content by PT999

  1. PT999

    NYC Code Basic Wind Speed 98 mph vs ASCE 7-10 (121 X 0.6 = 73 mph)

    OK- thanks everybody, I see my mistake, and read the first paragraph.
  2. PT999

    NYC Code Basic Wind Speed 98 mph vs ASCE 7-10 (121 X 0.6 = 73 mph)

    Section 1609.3 Basic Wind Speed - Is this velocity for ASCE 7-05 or ASCE 7-10 The referenced standards in the back of the code list both! It appears to be ASCE 7-05 because Section 1609.1.1 - Determination of wind loads references ASCE 7 (no edition stated) references Chapter 6. Looking at...
  3. PT999

    Piles using water jetting - Sandy soil

    Yes, "not going"
  4. PT999

    Piles using water jetting - Sandy soil

    Sure, but the jetting contractor is going to bring a traditional hammer
  5. PT999

    Piles using water jetting - Sandy soil

    In designing water jetted piles, is there a design procedure different from standard driven piles? When these piles are installed, since there are no blow counts, how do you determine that you have reached load capacity? Any books on this?
  6. PT999

    wood beam + steel (bolted together)

    Staggered Bolt Question q is shear force per unit length tau (usually inches in US customary So your answer is that the bolt spacing is not doubled for top and bottom staggering. Is that right?
  7. PT999

    wood beam + steel (bolted together)

    Question on Shear Flow calculation If the bolts are 16" o.c. top and bottom staggered as is usual, do you consider the spacing to be doubled (32") for distance in q =(VQ)/(Ixx t) where t = distance between bolts.
  8. PT999

    Existing Subgrade - no fill - Do you check for soil density as if it were fill.

    The situation is this, As special inspector (not engineer of record), I arranged for nuclear gauge density testing, and some locations failed. The Geotech engineer came out and stated that the testing was not required for non-fill situations, and that the conditions observed (even though...
  9. PT999

    Existing Subgrade - no fill - Do you check for soil density as if it were fill.

    Soil is theoretically undisturbed, although the excavator may have disturbed it a little at the top. The consensus is that density testing has no value. But I still have spongy spots, so I have asked that they be removed and replaced with RCA.
  10. PT999

    Existing Subgrade - no fill - Do you check for soil density as if it were fill.

    After an area is excavated for footings, do you check for soil for density, or do you assume subgrade is suitable without testing. I have a project where Nuclear Gauage was used with failing tests, no fill was used.
  11. PT999

    Welding A36 to A992

    Specifically this is indicated in the American Welding Society codes. Refer to AWS D.1 (2010 ed), where the specific filler metal required are shown in Table 3.1. As you probably don't have it, I will quote the tables. For SMAW welding, the electrode to be used is shown as either E7015...
  12. PT999

    Wind Loads

    The basic equation for wind pressure in US customary units is Pressure = 0.00256 x Velocity^2 where Pressure is in psf and Velocity in mph. So for example, 120 mph = 37 psf. I imagine out a sea during a hurricane velocity is even higher. I remember years ago (1970's_before all the...
  13. PT999

    Wrought Iron Material Properties

    Look online at the New York City Building Code 1901 edition. It has ultimate tensile strength values for wrought iron and steel that apply to buildings of that era.
  14. PT999

    RAM Advanse Shell Analysis for Steel Plate - No error message but stresses not correct

    Thanks, that was it. I was looking on screen.
  15. PT999

    RAM Advanse Shell Analysis for Steel Plate - No error message but stresses not correct

    I am modelling a theoretical 2 ft square steel plate to see how it works, and not getting good results. I have created a shell, segmented it to 16 pieces, gave it 1/4" thickness, added pressure load, provided restraints at 4 corner, and added pressure load to the load condition equations. It...
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