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  • Users: drewtheengineer
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  1. drewtheengineer

    Corrosion within Fireproofing

    Let's say we have a residential building comprised of a parking garage with a steel bar joist system above. The joists had significant surface rust however no reported penetration/deterioration into the cross section of the members. Without any further preperation (i.e. sand-blasting, priming)...
  2. drewtheengineer

    Welding Inspection Qualifications

    Stay with me here... The IBC (specifically NY State BC) states under Chapter 17, Special Inspections (1704.3.1) "The basis for welding inspector qualificaion shall be AWS D1.1" I don't have AWS D1.1 but I found an article stating that Qualification and Certification of inspectors are two...
  3. drewtheengineer

    Masonry Firewall

    So I'm at a meeting the other day when the client tells me I need to spec out a "break away bolt" at the firewall bracing connection. First, is there a such thing as a break away bolt and if so, how does it work. The detail is as follows. An 8" cmu firewall fits in between a unit separation...
  4. drewtheengineer

    Remote Control 3-way switch

    Anyone know if a remote control 3-way light switch exists? I want to put a remote control switch on a brick wall and I don't want to screw around with running wire to it. I've seen a two-way remote control switch that runs on AAA batteries. Maybe if there is no 3-way remote control switch, is...
  5. drewtheengineer

    Cub Scout Presentation

    I'm presenting engineering to the 4th graders in my son's cub scouts tonight. I had planned on discussing a little bit about what a structural engineer does. I'm also going to bring in a transit and do some surveying. I would like to have them do some kind of project also. When I was in 7th...
  6. drewtheengineer

    Anchor Bolt Proof Load Tests

    I have existing epoxy anchor bolts embedded in a slab with a dbl wood bearing plate on it. Can anyone recommend or point me in the right direction for a proof load testing procedure for these bolts? Thanks, Drew
  7. drewtheengineer

    Corrosion of galvanized plates

    Two part question. First, Is there a relatively easy way of stopping corrosion on a metal truss plate? I have wood roof trusses in a building on the beach and the salt air has begun corroding the metal plates within just a few years. I could attach plywood gussets over the plates but this...
  8. drewtheengineer

    Tools for Proof Loading Anchor Bolts

    Simpson used to make proof load indicators though they have stopped for one reason or another. Does anyone know of another manufacturer who makes these? Drew
  9. drewtheengineer

    Perforated shear wall design

    When performing a perforated shear wall calculation, a factor (F) is determined. Now if I have more than one wall in line with each other is it proper to multiply this factor times the length of the perforated wall (giving me an effective length of just one of the multiple walls), then adding...
  10. drewtheengineer

    Exposure Category D

    Exposure Category D is defined as "Flat, Unobstructed wind flowing over open water..." I have a situation where the site is up on a hill but does have an unobstructed path to over a mile of open water. I'm tempted to use 'D' however I'm thinking that perhaps the effect caused by...
  11. drewtheengineer

    Exposure Categories

    So I'm doing what I normally do on Saturday night, when I come to Section 6.5.6 of ASCE 7-98 (Exposure Categories). It seems that Exposure D is described as Flat, unobstructed areas exposed to wind flowing over open water. Well one site that I have in mind is just that, however it sits up on a...
  12. drewtheengineer

    Topo Maps

    I'm searching for a site that would have topo maps online for FREE! I've found a s*&t load of sites where you can buy them but I've got to believe some topo nerd has indexed the entire topography of the U.S. one lonely Friday night. If you know of such a site, or are the lonely topo nerd...
  13. drewtheengineer

    Designing "adjustable" foundation for settlement.

    I have a temporary structure (5 years), that will be sitting on poor soil (about 4' of decent fill on silty clay with a very low blow count). The thought is to build an adjustable floor over the foudation where periodically, an adjustment can be made to keep the building level as settlement...
  14. drewtheengineer

    Attic Load

    Can anyone confirm or deny the following statement: According to the IBC/NY State BC, no attic load needs to be included in a multifamily building.
  15. drewtheengineer

    Out of plumb column

    A steel column was installed out of plumb (1-1/2" in 8'-6"). I know this is out of the L/500 allowable. Does anyone see a problem with analyzing the column as is (in other words checking the increased load due to the angle, shear through the connections at the top and bottom of the...
  16. drewtheengineer

    Unbraced Length

    I have always used inflection points for determining unbraced lengths at negative moment locations on a beam. I was just informed that this is not okay. Can anyone either lead me to a code or standard that discusses this? Thanks in advance, Drew
  17. drewtheengineer

    Welding to top flange of w-shape in negative moment.

    Can anyone lead me to literature on standards of welding a plate across the top flange of a beam which is in negative moment?
  18. drewtheengineer

    Software Recommendation???

    I'm interested in modeling software primarily for wood framed structures (residential, multi-family). Does anyone have any recommendations? Please include a website if available. Thanks, Drew
  19. drewtheengineer

    Roof Uplift

    With shallow roof pitches, windload on both the leeward and windward sides create an uplift. Logically, this is hard for me to see. How can wind hitting a surface actually lift it up? I reason it as such... (correct me if I'm wrong) It's similar to an airplane wing. The air traveling over...
  20. drewtheengineer

    Compressive strength test on existing round columns

    Can anyone school me on a non-destructive test to determine compressive strength of an existing round columns (test cylinders, of coarse, have been disposed of)?

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