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  1. jechols

    MT-SCBF- Limiting Width-to-Thickness Ratios - Table D1.1

    I have several MT-SCBFs I am designing the connections for. I have determined several of the members do not meet the requirements of D1.1 for b/t ratios. My question is when do the webs of beams, columns, and/or struts have to meet the h/tw limiting ratio? Depending of the axial load, several...
  2. jechols

    Is stacked X-brace same as K-brace

    Thanks to everyone for your responses!
  3. jechols

    Is stacked X-brace same as K-brace

    That is what I was thinking until I found this article.https://files.engineering.com/getfile.aspx?folder=f6198439-9816-4ef7-9f8b-aaaa84d8b7df&file=steelwise-october-2013.pdf
  4. jechols

    Is stacked X-brace same as K-brace

    thread507-422360 I have a one-story structure with stacked X-bracing same as the referenced thread above. I am not understanding how it is not a K-brace. The definition from AISC Seismic Design Manual (5.2) states: where a brace frames to a column at a location where there is no out-of-plane...
  5. jechols

    Welding of already fabricated beam connection angles that were intended to be bolted

    Thanks WARose, Just discovered other issue so the angles will all have to be refabricated anyway.
  6. jechols

    Welding of already fabricated beam connection angles that were intended to be bolted

    I have a project where beam to column web connection angle have been fabricated (bolted-bolted) but are on 4" C/C and will be impossible to install. Is it acceptable to change to bolted-welded using the already fabricated angles that have holes in both legs. The angles will be shop welded to the...
  7. jechols

    Uplift on masonry wall

    Thanks for the reply Mike. Where would you measure the development length from? The hook on the hooked anchor bolt or the bottom of the embed plate?
  8. jechols

    Factor of Safety for Foundation Overturning

    I think you only need to satisfy the load combinations. 0.6D + W or 0.6D + 0.7E. Using the load combinations gives you a factor of safety of 1.67 using service level loads which is D + W or D + 0.7E.
  9. jechols

    Uplift on masonry wall

    I have a general question about uplift on a fully grouted masonry wall. I am looking at FEMA 361, Second Edition / August 2008, page 6-26 (166 of 374) Figure 6-4. Here is a dropbox link to that page: https://www.dropbox.com/s/5zjiqca8qo8v1it/FEMA%20361-Figure%206-4.pdf?dl=0 This is a diagram...
  10. jechols

    ASCE 7-05 Wind Code Interpretation

    Thank you for responding!
  11. jechols

    ASCE 7-05 Wind Code Interpretation

    I am trying to determine if my interpretation of the wind pressure distribution for walls in ASCE 7-05 is correct. Method 2 - Any Height: Only the windward wall pressure varies with height "z". The leeward and side wall pressures should all be calculated using the mean roof height "h" to...
  12. jechols

    Cutting an opening in unreinforced CMU wall

    I have also through-bolted a channel each side, then remove the wall below, and then welded the bottom plate to the channels.
  13. jechols

    French drain?

    StructuralEIT: A sump is not required for it to be a French Drain. Sometimes a sump (which is just a pit) is located at the end of a French Drain System but not always. Some french drains just daylight and the water flows out at a grade lower than the elevation you directing water away from...
  14. jechols

    French drain?

    Definitions: A shallow trench, perhaps lined with tile or containing a perforated pipe, backfilled with gravel and then covered over, used to collect and channel runoff water. a drainage trench filled to ground level with fragments of brick, rock, etc. Here is a link...
  15. jechols

    French drain?

    IMO a french drain system is free draining stone (#57 maybe) in wedge behind basement wall with a perforated pvc drain pipe next to footing or at base of wall. If that is installed the Geotech usually gives me 50 pcf equivalent fluid pressure for an at-rest condition like a basement wall. J
  16. jechols

    maximum building height for type V construction

    Also anything taller than two (elevated) floors and roof requires a shrinkage analysis if made of wood. For that tall I bet the only option would be to ballon frame it to use wood. (IBC 2006 Section 2304.3.3 pg. 426) J
  17. jechols

    Problems!

    I thought I read somewhere that after the building was fixed his insurance company actually lowered his premium because of the way he handled the situation.
  18. jechols

    Seismic Load on Basement Wall

    I have a project with soil bermed up on two opposing sides of a building all the way to the roof (1 story about 20' tall). Would you consider the soil when determining base shear? Thanks, j
  19. jechols

    slab on grade design

    Here is a link to exel calcs website. It has spreadsheet grdslab.xls. I know you want by hand reference but in the first tab of the spreadsheet the author lists all of his references. j http://www.excelcalcs.com/ You have to sign up to be able to download (free). It is located in the...
  20. jechols

    Survey Practice in Facility Work

    I do it on almost every job. I usually refence the absolute floor elevation and then reference the various elements relative to the floor using plus or minus e.g. top of footing (-2'-0") or top of steel (-6"). j

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