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  1. Deutero

    Welding Pre-1920 Steel to New Steel

    I am asking this question for PT999 as well as myself. PT999 has posed a similar question at thread507-167093. Can an existing 15" wide flange erected in 1907 be field welded to a new A992-Gr 50 wide flange? What material would the 1907 beam be composed of? Thank you ...
  2. Deutero

    Weld Connections - 1920's Steel

    How large does this coupon need to be? I intend on welding the bottom flange of a 15" x 60 plf section erected in 1907, to the top flange of a new section to create a built-up section for an existing facility.
  3. Deutero

    The Birth of Nominal Wood Sizes

    When was the birth of nominal wood sizes? What is the origin of nominal wood sizes? Just curious ...
  4. Deutero

    1907 Lumber Design Values

    SlideRuleEra, or other, I just found more from an apparent specbook accompanying the blueprints: Floor joists: 3x12 sound #1 pine joists and 2x12 sound #1 hemlock free from shakes. What might the term "sound" refer to? Actual? Thank you ...
  5. Deutero

    1907 Lumber Design Values

    Actual 3x12 floor joists at 16" oc for the second floor of a former firehouse wanting to turn restaurant and banquet hall. Where can I find design values and a reasonable assumption of species for this structure built in Door County, Wisconsin in the year 1907? Keeping in mind, the lumber is...
  6. Deutero

    1907 Lumber Design Values

    Actual 3x12 floor joists at 16" oc for the second floor of a former firehouse wanting to turn restaurant and banquet hall. Where can I find design values and a reasonable assumption of species for this structure built in Door County, Wisconsin in the year 1907? Keeping in mind, the lumber is...
  7. Deutero

    Required Number of Anchors & Mechanical Anchoring

    DaveAtkins, Where do you find this exception?
  8. Deutero

    Required Number of Anchors & Mechanical Anchoring

    I recall approximately ten years ago, when a PEMB company (specifically ABC) had changed their rigid frame base plate anchoring from two anchor bolts to four anchor bolts. Apparently for some time, the two were acceptable. I do not recall whether the change was a code requirement or revised...
  9. Deutero

    Torsional capacity of built up light gage members

    UcfSE - Can you give me an example of a horzontal stiffener where the brick angle connects to the web? I suppose you could have a horizontal stud member contained within the box at the elevation of the connection. What other idea might you have? As far as a vertical stiffener, I'm imagining...
  10. Deutero

    Mech / Equip / Display Mezz Live Loads

    What about display shelfs in churches or other areas of aethetics, such that, due to the design parameters, such as size and location, which would render the space as uninhabitable, it may be obvious that it would never be used for storage or mechanical. Consider classrooms being 40 psf. Would...
  11. Deutero

    Mech / Equip / Display Mezz Live Loads

    Anybody?
  12. Deutero

    Mech / Equip / Display Mezz Live Loads

    IBC does not list minimum live loads for mechanical, equipment or display mezzanines. IBC 1606.2 states to include fixed service equipment dead loads. After equipment loads have been considered, what do you use for overall live loads, for the above specified commercial occupancies? Thank you ...
  13. Deutero

    Sill Anchors

    I forgot to add. My firm does not do residential. Is there anything in any code, regulation, ordinance, etc, that would allow 1/2", non-corrosive finished, sill anchors, for fastening preservative treated wood to concrete foundations, for commercial structures? Thank you...
  14. Deutero

    Sill Anchors

    Thank you SlideRuleEra for your reply. The reason I ask, is because for several years, the contractor I work most closely with, has been wanting my firm to conform to the other architect and engineering firms that they work with. Those other firms have been specifying 1/2" anchors (w/o...
  15. Deutero

    Sill Anchors

    Is there was a requirement, in IBC, stating that when fastening preservative treated wood sills to concrete foundation, the anchors must be of corrosion-resistant material such as galvanizing or stainless? I thought there was and I cannot find it. Thank you...
  16. Deutero

    Ladders Rungs - Fixed or Pinned?

    JStephen, As you may have noticed, I'm green in determining the difference between a pinned and fixed connection - I may even need to post a thread asking the real difference between the two when referring to a continuous multi-span beam. I do understand that inserting the bar into the...
  17. Deutero

    Gypsum Shear Walls

    RE: IBC 2306.4.5 I know I've used this table in the past, and I thought that the table represented gypsum used on only one side of wall. Therefore sheathing both sides allows me to double the values. But, I'm not reading this anywhere. Also, there does not seem to be any reduction factors...
  18. Deutero

    Ladders Rungs - Fixed or Pinned?

    For simplicity, I start all of my basic calculations for mild carbon steel at Fb=0.6Fy. Even if I apply 0.75Fy per AISC 9th (F2-1), the conservative 300 lb point supported by a pinned end connection, still exceeds that Fb that a 3/4" dia A36 will provide. Through the use of the intent of this...
  19. Deutero

    Odd Steel Joist

    Depending on the actual WT designation, these seem to be large joists? Are they in an industrial occupancy? Could it be that they were designed by an independant engineer as opposed to an SJI manufacturer? If there is anything fortunate about these joists, the shapes are at least something...
  20. Deutero

    Ladders Rungs - Fixed or Pinned?

    In light of the "Complexity of Engineering" thread, I prefer to keep things a s simple as possible. But, this is why I ask: In the past, I have figured ladder rungs to be required to support a 200 lb concentrated load at mid-span for a conservative pinned support. Similar to what JStephen...

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