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  • Users: jopalu
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  1. jopalu

    Steel Deck: Sp & Sn = Sx?

    Refering to a Vulcraft Steel Roof and Floor Deck catalog/design guide, the section properties list values for "Sp" and "Sn". Are these values equivalent to the Section Modulus about the X-X axis? Please advise ...
  2. jopalu

    Precast Plank Cleavage Membrane

    When the floor finish is a cementitious tile, (i.e. ceramic, quarry, etc) a cleavage membrane, composed of a 0.7(+/-) mil poly, is recommended to separate the concrete topping from bondage to the structural precast plank. Thus, it is understood, that the concrete topping is no longer a...
  3. jopalu

    Development of Rebar

    What is the difference between development and embedment of rebar? Thank you!
  4. jopalu

    Minimum Reinforcement in Footings

    Why is there no apparent code requirement for minimum reinforcemnt in, specifically, continuous wall footings? Is there a requirement that I do not see? Please advise - Thank you!
  5. jopalu

    Aluminum

    Would anyone please provide me with the Fb, Fv and E values for ASTM B-221/429 Aluminum 6061-T6 or similar? I have Strength of Material books, but, I cannot find those design values. Thank you ...
  6. jopalu

    Expansion / Control Joints

    I don't see this as a structural issue, however, I was asked to inquire - Is there a code or personal standard used for distances and spacings of expansion or control joints in foundation walls, retaining / basement walls, where the inside face of the concrete wall is exposed to an occupied...
  7. jopalu

    Nailing Pattern

    Can you direct me to a Nailing Pattern for SIDE-LOADED multi-ply wood (dimension lumber) beams? Thank you...
  8. jopalu

    Flitch Plate Design

    When designing a wood/steel section(beam) with flitch plate, is it reasonable to determine a "transformed" Allowable Bending Stress, Fb, by reason of propotionality? i.e. A 4-ply 2x12 SYP #1 (Fb=1,062 psi)(wet-service adjusted) w/1-ply A36 0.25x11 (Fb=21,600 psi) A(SYP)=67.5 si A(A36)=2.75 si...
  9. jopalu

    Anchor Bolts: A36 or A307?

    AISC 9th, says A307 has a higher Tensile strength, as well as higher allowable tensile and shear loads as compared to A36. I can find neither a Yield strength, nor an Ultimate value for A307. Why? Other than the slight difference in values, what advantage does one have over the other? Thank...
  10. jopalu

    Does ACQ affect design values?

    Does ACQ-treatment of 2x10 & 2x12 lumber, require design value adjustment? More specifically, after applying the NDS Table 4B Adjustment Factors, Cm for wet service conditions, to SYP #2 & #1 lumber, must design values be further adjusted for ACQ-Treatment? Thank you ...
  11. jopalu

    ANSI/SPRI ES-1?

    In Wisconsin, we still design under 2000 IBC. I recently received an advertisement for a Wind Design Seminar entitled "Understanding ANSI/SPRI ES-1", which is an alledged, required standard for roof edges in the 2003 IBC. I tried to find this publication on the ANSI.org site. It could not be...
  12. jopalu

    IBC Table 2305.3.7.2

    With a Maximum Opening Height equal to the Wall Height, this seems to be an unacceptable interruption in the shear wall, thus preventing a "simple" transfer of force, if any transfer at all, from one full-height sheathing segment to another. Simplicity, I believe, is the intent for the use of...
  13. jopalu

    Southern Pine (Wet Service Conditions)

    For 6x6 posts, the species most commonly available in this Wisconsin area is SYP #2. The only design values available in the NDS are for (Wet Service Conditions). The posts will not be exposed to the weather. Do I need to alter the design values by any factors in any way? thank you ...
  14. jopalu

    Semi-Trailer Dolley Pad

    I need to design a Semi-Trailer Dolley Pad to support the front end of the trailer, in the absence of the tractor. What is the max total carrying load of a semi-trailer? 45K?
  15. jopalu

    Interior Wind Pressure

    Is an interior wind pressure of 5 psf required for all interior partition walls in all buildings? In buildings without OH doors? In buildings with vestibules? is this stated either in IBC or ASCE7-98 or 7-02? If so, where? Thank you ...
  16. jopalu

    Moment x Moment?

    | 5' \|/ 2.4K ___________ M1 | | | | 12' | | | | M2__|__ I have a 2.4K point load at the end of the cantilever which produces a 12.0 k*ft moment at top of column. Do I then determine M2 to...
  17. jopalu

    HVAC Screen - MWFRS or C&C?

    Would you consider an eight foot tall x 21' x 13' HVAC screen on top of a pre-eng metal building roof, under 30' high, to be a structure required to resist wind loads calculated for MWFRS or C&C? I'm seeing this as a C&C element considering other adjacent, geometries of the building. Please...
  18. jopalu

    Spandrel Beam

    Can a horizontal spandrel beam rest and bear continuously on top of a CFS stud wall, of sufficient strength, thus requiring strength only in the major-axis, normal to the vertical plane of the wall, and further, eliminating the need to design for minor-axis vertical deflection? Am I making...
  19. jopalu

    Concentrated Loads on OWS Joists

    It is quite common to reinforce existing OWS joists, to support newly imposed concentrated loads, with angle from load to nearest panel point at opposite chord. The question is, do we add only one angle on one side, or one angle on each side? Could the joists experience torsion if not...
  20. jopalu

    Ponding Over Steel Roof Joists

    In The Northern United States we have snow loads in the winter. Some argue that, while ponding would only occur during the summer months, the winter snow consideration equalizes the need to consider potential ponding. (Many variables to consider.) Consider a lower flat roof with drift loads...

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