CSA S16:19, Design of steel structures, has introduced changes to the factored shear resistance of fillet welds. In both the current edition, S16:19, and the previous one, S16-14, the shear resistance of a concentrically loaded weld segment is given in Clause 13.13.2.2: where: If we incorporate the strength enhancement factor and the reduction factor for multi-orientation [...]
A quantity that is often used when designing a steel beam according to CSA Standard S16 Clause 13.6 is Lu , the longest unbraced length with which the beam will reach either Mr = φ Mp or Mr = φ My , depending on the class of the cross-section. In other words, whenever the unsupported length of a [...]
The turn-of-nut method is the standard installation method for high-strength fasteners such as ASTM F3125 grade A325 and A490 bolts. Pretensioned assemblies are installed to a minimum bolt tension specified in CSA S16-14 Table 7. According to Table 8, for a bolt length between 4 and 8 diameters (not exceeding 200 mm) for example, the nut [...]
The CISC Handbook contains a number of tables for Eccentric Loads on Bolt Groups in Part 3. The tables (3-14 to 20) include groups with one to four columns of bolts, with a vertical load applied at an eccentricity e = L with respect to the group centroid. The tables may be used with both ASTM [...]
Dr. Muntasir Billah, P.Eng. Assistant Professor, Department of Civil Engineering, Lakehead University Column base plate connections, typically consisting of a steel member welded to a steel base plate connected to the concrete base via anchor rods and grout, are commonly found in building and non-building structures. This base connection is one of the most important [...]
CISC Steel Expert Bob Shaw The new CSA S16:19 Design of steel structures introduces "Guidance for specifying third party inspection of steel structures" as an informative annex. The challenge of writing such a document is one that was well-stated in the Foreword of the 1946 American Welding Society D1.0 Standard Code for Arc [...]
A typical concentrically braced frame featuring X-bracing and subject to a lateral load "P" is illustrated in Figure 1. The compression brace (C) is susceptible to in-plane buckling, although out-of-plane buckling is the more common governing condition. In the following discussion, it is assumed that the diagonal braces are continuous and connected at the intersection point. [...]
CISC provides this column as part of its commitment to the education of those interested in the use of steel in construction. Neither the CISC nor the author assumes responsibility for errors or oversights resulting from the use of the information contained herein. Suggested solutions may not necessarily apply to a particular structure or application and [...]
Assumption: Top flange is in compression and bottom flange is in tension. Definitions: PNA: The plastic neutral axis is defined as the axis that divides the cross section such that the compression force from the compression area is equal to the tension force from the tension area. Its’ location is denoted by, yp. b: Width of [...]
Part 3 in the CISC Handbook of Steel Construction shows various configurations of beam-to-column moment connections designed to resist wind and gravity loads, along with detailed calculations. As illustrated in the accompanying figure, a typical moment connection has beam flanges welded to an unreinforced column using complete-penetration (CPG) groove welds and a single-sided bolted (or [...]