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  • Users: CROWN06
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  1. CROWN06

    Base Plate design AISC 13th edition

    Any body has any freeware or spread sheet for design of base plate as per AISC 13th edition, ASD or LRFD.
  2. CROWN06

    Stiffening a Bar Joist Floor for Vibrations

    cedent When I look at FIG 7.1c, Isn't the new bottom chord, below queen posts, sufficiently long to be unbraced in both horz. & vertical planes.Also now the joist is deeper than before.
  3. CROWN06

    Just a thought

    Apsix and Prex What will increase the axial force? Make a 24" deep truss and place loads at panel points than reduce depth to 12" with same configuration. Do not change diagonal angles (slope) or any geometry. You can shorten the truss in length and add one more panel to match original length...
  4. CROWN06

    Just a thought

    The shallow the truss, less longer the members and hence more axial capacity. So apparently no need to strengthen members if we shallow an existing deep truss or O.W.S.J. Probably it is needed when we check it for axial forces from moment, i.e we find out moment at mid span and depending on...
  5. CROWN06

    Seismic design of footing

    As per my knowledge you cannot reduce any further if you are using ASCE 7-05 combos. As far as section 12.13.4 is concerned, I am sure 25% reduction is ok when without seismic load the stability is 1.5. One small tip, I have worked overseas and standard of construction are mostly sub-standard...
  6. CROWN06

    Seismic design of footing

    Refer to Page 122, ASCE 7-05, note a. Hence after analysing your steel rack, what ever reaction comes, the E will be taken the value it comes, if you are designing your conc ftg using Strength method and factored loads. when your are checking soil bearing capacity, divide E values with...
  7. CROWN06

    Dubai sand not suitable for concrete?

    I have worked in Abu Dhabi in 1992 - 1995. To my knowledge both Dubai and Abu Dhabi get sand from AL AIN and the major suppliers were only two (one is Al-Sharafi) at that time. I had always problem with the quantities. They will always write 32 m3 supply note on truck whose body label says...
  8. CROWN06

    Mat footing

    I need to design a square mat footing. It has four concrete pedestals symmitrical arrangement. Any idea how to find maximum moment and shear + other tips on what is needed to be done.
  9. CROWN06

    Maximum number of Bars in Beam

    JLNJ 18" wide beam, 9 - #9 bars.
  10. CROWN06

    Maximum number of Bars in Beam

    Does anyone have something handy to find out what will be the maximum number of bars in beam as per ACI 318-05. In case. they do not fit in one layer than what are the if and buts for second or higher layer, stirrups requirements and detailing. Thanks.
  11. CROWN06

    Double angle gross area.

    I am trying to model a truss using SAP2000. I am unable to understand that in output Why Sap can reduce the cross sectional area of double angles. To me the area should be constant But as I enter different spacing for back to back legs, x-area changes.
  12. CROWN06

    Retaining wall footing

    rho minimum = 0.0018 x hf / ( 2 x d), where hf = height of footing and d is hf-cover. Is this formula ok as per ACI 318-05 for minimum steel to be used in concrete retaining wall footing.
  13. CROWN06

    Concrete Retaining wall- FOS

    Which code explains the limit for minimum FOS for overturning and sliding of reinforced concrete wall (and under which clause)
  14. CROWN06

    ASCE 7 -05, Clause 2.4.1

    If you read at the end of allowable stress combinations, they do not allow for increase in allowable stress. Does this mean we cannot increase soil bearing capacity 33% due to wind or seismic load.
  15. CROWN06

    Pile cap reinforcement above pile

    Is it as per ACI detailing standard that the pile cap bottom mesh should be 12 inch high and pile steel should enter into pile cap run vertically 12 inch and than bend over pile cap bottom steel.
  16. CROWN06

    Minimum (As) reinforcing steel in footing

    In footings many engineers tend to ignore this minimum steel ratio bw x d x 200/fy . Does ACI or any thing relevant confirms this anywhere. Thanks in advance.
  17. CROWN06

    circular footing design

    Any design aid, freeware, spread sheet to design hex or octagonal shape footing
  18. CROWN06

    circular footing design

    8 feet dia to 32 feet dia tanks and high up to 50 feet. So footing can be 0ne or two feet larger. No pedestal. Tanks are directly mechanically anchored to circular slab on grade.
  19. CROWN06

    circular footing design

    Any guideline on design of circular spread footing
  20. CROWN06

    circular pile cap deisgn

    Anybody has any freeware or spread sheet for deisgn od circular pile cap for Tanks.

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