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  • Users: joemarch
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  1. joemarch

    K-Bracing

    Is it a right assumption to model the k-bracing in a frame as tension only members? I've entered a frame into RISA and specified the k-braces to be tension only members. In the results it shows the members taking compression. Should I model the bracing as compression members?
  2. joemarch

    Masonry Support

    Unfortunately I have a situation that I need to support brick that needs to be supported by something skewed and sloped (the mason will love my I'm sure). Thus the brick will want to slide off the support in multiple directions. The shall be provided to prevent this sliding? Welded studs or...
  3. joemarch

    Anchor Bolts

    Typically I use F1554 anchor bolts. I have a case where I need to develop the capacity of A325 bolts in a cage of steel. Is it possible to get headed anchor bolts 30" long with a capacity equal to A325's. Thanks for your help.
  4. joemarch

    Masonry Openings

    I have some 16'-0" masonry openings. I'm providing wide flange lintels to support the masonry. These lintels also see a wind load. Should these lintels be designed for an unbraced length of 16'-0" for the gravity load?
  5. joemarch

    ACI 10.8

    In my old ACI 318-89 section 10.8.4 it states that a compression member with a larger cross section than required, a reduced effective Ag may be reduced to 1/2 to determine minimum reinforcing. Won't this be the case in every axially loaded column? I guess I don't know if I totally have...
  6. joemarch

    Composite columns

    I have a situation where I have 10x10 tube columns. The architect wants to encase them in a 16x16 concrete to protect them and give them the "parking garage look". I'm not relying on the concrete to provide any structural value. I'm still plan on puting a #4 in each corner and having #3 ties...
  7. joemarch

    Parking garage floor slab

    I'm designing a 3 story retail building with the first level being parking space. This space is unheated and exposed to the weather. Frost protection is a must. Obviously my spread footings and wall footings will be deep to provide frost protection. What sort of things can be done to protect...
  8. joemarch

    Masonry Wall

    I have a situation where I have a 42' high 12" masonry wall which is exposed an exterior wind load (stair tower). So I'm treating it as a simple span. I can reinforce it enough to take care of the stress. Will deflection be an issue? How is deflection calculated? Thanks for your help.
  9. joemarch

    Floor Vibrations

    I am in the process of checking a composite floor per the AISC design guide #11 for floor vibrations. I have a situation where my joist spans differ on each side of my beam. Here’s the question. When calculating Bg(page 18), what Dj value do I use if my joists differ on one side of the beam...
  10. joemarch

    Steel Shop Drawings

    I think I need to vent a little bit...... Once and awhile I will get a request for the structural drawings and details from the structural steel supplier. I've always had a bad vibe about the steel supplier using the drawings as erection drawings. I clearly state on my drawings (in my...
  11. joemarch

    Rigid Diaphragm Analysis

    Can any body direct me to any information on the design of rigid diaphragm torsion using a combination of masonry shear walls and moment frames. Has anyone ever done this design before? Thanks for your help.
  12. joemarch

    2 STORY OFFICE BUILDING

    I have a 2 story office building (approximately 60'x220') with the floor framing being precast plank and the roof framed with bar joists. The grade along one side (the 220'dimension) is all the way up to the precast. So basically its a walk out basement. What is the easiest way to account for...
  13. joemarch

    The benefits of post tensioned slabs/beams

    I've seen a bunch of threads lately about post tensioned slabs and beams. I've been practicing about 10 years now and never had the opportunity of designing using post tensioned members. I probably would shy away from it since I've don't have any experience designing or detailing. Is this...
  14. joemarch

    Story Drift Due to Wind

    I am in the process of evaluating a warehouse building that has been framed with multi beam and column lines. The beams and columns were designed as moment frames. The exterior building has been framed with light gauge metal studs (w/slip connections)and gypsum sheathing. Attached to the metal...
  15. joemarch

    New punched openings in existing cmu.

    I'm dealing with puting some new opens in both bearing and non-bearing cmu walls. The opens range from 6'-0" to 12'-0". Its obvious I need to provide a steel lintel and columns for the larger openings. My question is for the smaller opens. How much of the cmu wall next to the open can I use...
  16. joemarch

    Roof expansion joints

    I am in the process of designing a warehouse structural that has tilt-up precast wall panels and a bar joist roof with steel beam lines. The building is about 160,000 sq.ft (approx. 350'x450'). I was wondering if anyone had any information or could direct me on how often or if I need an...
  17. joemarch

    Paper Calmenson & CO. joist load table

    I am looking for the allowable load on a joist from Paper Calmenson & co. The tag reads B6022 18 28-8 it is spanning 28' any help on this would be great thank you.
  18. joemarch

    Paper Calmenson & co joist load tables

    I am looking for a Load table for a Paper Calmenson & Co joist the tag readsB6022 18 28-8 the joist is spanning 28' if any body can help it would be great
  19. joemarch

    Paper Calmenson & Co. joist help

    Does anybody know where i can get a load table for a Paper Calmenson joist. The joist tag reads (B6022 18 28-8) it spans 28' i need to know the load it can support. thank you
  20. joemarch

    responibility's and eduction for struc. drafter

    I was woundering what responsibilities people give to the cad drafters they work with, and also how we can find out about classes or seminars to improve his qualifictions and abilities in helping me with inspections and design.

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