In AISC 360-16 Section E7 would be applicable for compression loading while Sections F3 through F5 would be applicable for flexure depending upon which elements are deemed slender.
generally speaking you should always be using the latest edition of the standard. There were a number of issues with the older allowable stress design as that standard was not kept up to date for many years until the introduction of the first ASD/LRFD AISC standards. That said, the real...
The preinstallation testing is designed to find a method to achieve the required pretension. Table 8.2 in the Specification is a target point for the tension required in the final installation. Preinstallation testing tensions are required to be 5% higher, which might impact your target...
If it's fully exposed, then I would assume that all of the bolts, nuts, etc. should be galvanized, overcoated with a good epoxy paint, or some other means to resolve long-term corrosion issues. I wouldn't anticipate that bolt to nut corrosion would be an issue simply due to the addition of...
The allowance for the swap of A194 2H nuts for A563 DH nuts in RCSC is due to a similar statement in ASTM A563 Table X1.1 Footnote A. The statement given is a question on availability of the A563 DH nuts for 3/4" diameter and larger. Whether that statement is still valid (as I suspect it's been...
Generally bolts in AISC are going to be either A325 or A490 (now known as ASTM F3125 Grade A325 or Grade A490). These bolts are only available in a heavy hex head. Nuts should be of a similar size, i.e., heavy hex nut. The larger head and nut are necessary to insure the ability to properly...
The DG is basically state-of-the-art when it comes to web tapered design. That said it will probably take a computer program or at least a fairly complicated spreadsheet to properly utilize it. An MBMA task group has begun working with Dr. White on an update / addendum to the guide to address...
Our old rule of thumb was 6 bays apart.
The real key is to typically have a braced bay within a bay or two of each endwall to handle the wind loads. Bracing intended primarily for seismic restraint should be spaced relatively uniformly along the length of the building.
Bracing for crane...
Canada uses the same cold-formed steel design specification as the US. In the US it is referred to as AISI, in Canada S136. The specification is written to cover ASD, LRFD, and LSD and provides safety factors for ASD and separate sets of resistance factors for LRFD and LSD. There are a few...
Canada uses the same cold-formed steel design specification as the US, AISI / CSA S136, with slightly different resistance factors. The specification cites safety factors for ASD and resistance factors individually for LRFD and LSD. The only option in Canada is LSD design, and yes, I chuckle...
I would say, No, you are not at plastic levels. The effect of ASD (without load factors) and LRFD/LSD (with load factors) should give the same basic stress levels in reality in your members. ASD uses a factor of safety, say 1.67, to cover all contingencies over working loads. This is...
Using the AISC Manual it is straight-forward in that all of the equations for capacities are given in a nominal (or ultimate) capacity mode. Simply adjust by either the safety factor (ASD) or the resistance factor (LRFD) to get the actual capacity for the methodology you are using. LSD is...
The RCSC rule, and by extension the AISC rule, is that the plate washer must cover the slot regardless of thickness.
RCSC Specification Section 6.1.2. Slotted Hole: when a slotted hole occurs in an outer ply, an ASTM F436 washer or 5/16 in. thick common plate washer shall be used as required...
Normally a single plate shear connection would be designed without using a slip-critical method. The intent of a shear connection is that it takes shear only, not moment. If you pretension the bolts to achieve the slip-critical aspect, you are then forcing moment through the joint which it...
