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  • Users: Gopher13
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  1. Gopher13

    Steel beam to beam moment connection

    I have a somewhat typical steel beam to steel beam moment connection (see attached). The cantilevered end of the moment connected beam is 16 feet. Strength does not control as I am only at about 40% capacity. However, I very much care about limiting deflection of the cantilevered end. My...
  2. Gopher13

    Partially grouted masonry shear wall - strength design with English units

    Hey friends! I am looking for a design example or guide for a partially grouted masonry shear wall using strength design and English units. I have the second edition of Design of Reinforced Masonry Structures by Narendra Tally and MSJC 2008. Neither seem to address the subject. Without a design...
  3. Gopher13

    economy of composite beams (steel beam with concrete over metal deck)

    I understand one big advantage of composite beams (steel beam with concrete over metal deck) is reduced floor to floor height resulting in savings of finishes and MEP. I have a case where they will be building a mechanical mezzanine inside an existing building. I am framing this mezzanine with...
  4. Gopher13

    On-line masters degree program

    I am bouncing around the idea of getting my masters degree in structural engineering. I live no closer than 2 hours from the closest university that offers such a program plus I work full time and have other obligations. Therefore, I would like to find somewhere that would allow me to do all (or...
  5. Gopher13

    Wood Truss Bearing Options

    I am designing a truss composed of 4 x 8 wood members (or something like that). The attached sketch shows two different bearing options. The first one has the bottom chord bearing on the wall right where the top chord runs by leaving only a small sliver left. The second one has the top chord...
  6. Gopher13

    All you Pre-engineered metal building people

    The organization I work for would like to build a pre-engineered metal building at one of our facilities. Up to now, I have never been involved in a PEMB project, but the way I understand it is I design the foundations (piers, foundation walls, footing) and the PEMB folks design everything...
  7. Gopher13

    vertical slip connection

    I have a question about a pretty common detail where I wish to transfer lateral diaphragm load into a wall but not gravity load. Please see the attached drawing. How do I assure the joist and angle will be able to move up/down without loading the wall? Do they not tighten the anchor very much so...
  8. Gopher13

    Light gauge steel delegated design

    A building addition I am working on includes a new mechanical penthouse on the existing roof. Light gauge steel studs will be used for the walls. I do not have any experience in light gauge design and was given a short schedule to design the entire addition so I am thinking about delegating the...
  9. Gopher13

    Allowing ground to freeze below foundatins during construction

    I have this exact phrase in both my general structural notes and specification (both in the concrete and earthwork sections), "Do not place concrete on frozen ground nor allow ground beneath foundations to freeze." It is also written in bold and underlined. The attached photo is 10 days or so...
  10. Gopher13

    Building Design vs. Bridge Design

    Two questions: 1. I do not know many engineer that have experience designing both buildings and bridges. Curious why this is? 2. For those fortunate enough to have experience designing both buildings and bridges, when comparing the two, what do you like and dislike? Thanks!
  11. Gopher13

    RISA Training

    Has anyone attended the 2 or 3 day training courses offered by RISA? Where they worth while? I am thinking of attending one of their upcoming courses, but it is a pretty big time and financial commitment so I want to get some reassurance before I sign up. I have used their tech. support over...
  12. Gopher13

    development of hooked dowels at the top of masonry walls

    In buildings constructed with masonry walls and wood truss roofs, I have seen a typical detail used again and again at the top of the masonry walls. Please see the attached sketch. The masonry wall is reinforced and there is a hooked dowel at the top of the wall into the bond beam. There is a...
  13. Gopher13

    Concrete Patch Repair

    I haven't really done any concrete repair work in my career until now, so I am looking to get an opinion on concrete patching details. In my specific case, I have 7 areas on a concrete pedestrian bridge that have spalled and need to be repaired. Each spall is approximately 14 inches by 14 inches...
  14. Gopher13

    Interface of interior non-load bearing and load bearing walls

    I have a question about what is typically done at the interface of interior non-load bearing and load bearing cmu walls at the slab elevation. Should the thickened slab for the non-load bearing wall be poured directly on top of the load bearing footing, or should there be a layer of soil between...
  15. Gopher13

    Embed Plate on Top of CMU Wall

    I have a question about where the top of an embed plate is typically placed with reference to the top of a cmu wall. Please see the attached sketch for reference. Option 1 shows the plate sitting on the top of the wall (bottom of the plate is at the same elevation as the top of the wall). Option...
  16. Gopher13

    Cracking of mortar joints in new cmu wall

    I have a newly constructed building with cmu walls. The building is approximately 250 feet long by 24 feet wide with a roof overhang of 8 feet on all sides. The top of cmu walls are 8'-8" above finished floor elevation. Window openings are 4 feet wide and are spaced at every 4'-8" on center. Two...
  17. Gopher13

    Staining/Discoloration on Recently Poured Slab on Grade

    I have an interior slab on grade that is showing staining and discoloration. In some places it looks as though mud was smeared on it. It was recently cleaned, so it is not dirty. It was poured about 3 months ago. The weather at the time was slightly below freezing, however the roof was on the...
  18. Gopher13

    Notched Wood Beams

    Hello!!! I am designing a softball dugout that has a sloped roof framed with 2 x 6's that bear on a cmu wall (well actually a 2x top plate) on one side and a triple 2 x 10 on the other side. My question is what is the standard practice at the two bearing locations? Are the 2 x 6 beams typically...
  19. Gopher13

    Minimum Roof Sheathing Thickness

    I have a question about the minimum thickness of roof sheathing, and please bear with me, I am self taught on wood design. With reference to the attached tables, it appears as though IBC 2015 limits roof sheathing to 5/8". However, the NDS Supplement diaphragm shear tables only give values up to...
  20. Gopher13

    Force Transfer Through Anchors

    All, I have an existing building where a new mechanical unit is being installed on the roof. The additional load causes the existing steel roof joists to be overstressed, so I will be adding new joists to share in taking this load. On one end, I am forced into bearing the new joist on a bent...

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