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  • Users: rfd23
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  1. rfd23

    Non Composite concrete floor on Steel Beams

    Hi All, I would like to have your feedback/thoughts on my current issue. I am working on old industrial(process) structural steel building 1960 era. it has 6 floors and a roof. All floors have 5'' concrete slab on steel beam. There is no metal deck, no shear studs and no horizontal bracing...
  2. rfd23

    Galvanize High Strength Bolts and Structural Steel

    Hi, I have concern on using galvanized bolts for structural steel connections due to bimetallic corrosion. Have any one used galvanized bolt on painted structural steel. Main Purpose for galvanizing is to protect bolts from corrosion, however i read that in this particular scenario (carbon...
  3. rfd23

    Code Compliance

    Hi All, I would like to get your opinion on previous code and current code application; A Industrial complex was built as per IBC 200x in 200x. I am not providing specific details. Owner engineer pointed out many deficiencies and code non-compliance during construction. Owner and EOR did not...
  4. rfd23

    floor frequency

    Hi, I am analyzing a industrial building with many vibratory equipment on elevated floor. I isolated a portion of a floor from col. to col. and performed a dynamic analysis to calculate fundamental mode of floor. My results are so scattered in x,y and z direction and mass participation is very...
  5. rfd23

    Temprature Loads for steel buildings

    Hi, I am working on a 350ftx185ft building - 175ft to 150 ft high. . Temprature difference (winter and summer months) is 80F. Building is heated but not air condioned. I have following issues to discuss 1- No expansion joint - should we design for temprature load. if yes - loads are so high it...
  6. rfd23

    Metal deck shear transfer system

    I am working on a industrial building. Elevated concrete floor on a composite metal deck. This is a electrical floor with some opening in the floor. Welding between metal deck and steel beam depends upon shear force transfer through deck. I am confused about the shear force. Q.1 IS it only...
  7. rfd23

    Reinforcing existing Beam

    I have existing W8x18 beam. I need to reinforce this beam due to change in span. I did some research on welding of plates to wxisting beam. Most of the time we weld horizontal plate on bottom of bottom flange or weld a vertical plate along web, welded to undrside of top flange and top of botom...
  8. rfd23

    structural steel connection design

    I am working in North America. client/upper management hires a korean detailing company for structural steel connection. Their typical shear connection detail is close to shear tab/ beam splice connection. We can use this type of connection as per AISC-ASD manual if we incorporate eccentricity...
  9. rfd23

    one way shear check for a pile cap

    Hello, I have a circular bin supported by 8 columns. Bin dia is 12m. we are using a octagonal pilecap with 56 piles. I am using 1.5m deep pilecap. otagone has 17m dia. To check the one way shear at d from the face of column, I am having 30 piles contribute to that section. shear capacity of...
  10. rfd23

    Pile Lateral Capacity Check

    Hi, I am doing CFA piles. We have large lateral loads due to high winds. I am writing what i think should be. Please comment on it if this is right or wrong or too conservative. Geotech. gave us lateral capacity table of pile. I am writing a part of it. serv.lat. load Capacity Ser. Def.(mm)...

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