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Time: 2016-08-05

DESIGN OF AXIALLY LOADED COLUMNS Universal Column UC sections have been designed to be most suitable for compression members They have broad and relatively thick flanges which avoid the problems of local buckling The open shape is ideal for economic rolling and facilitates easy beam to column connections Fig 5 Steel Bearing Pile Driven into Ground Steel Column Construction The next step of steel frame construction is the placement of steel columns The section of the steel is specified based on the load imposed There are various sizes of steel column section to choose and these steel columns are commonly produced in advance 20 2 2021 nbsp 0183 32 This video provides an introduction to column base plate design The concepts covered herein apply only to axially loaded columns A discussion of the differ The most common form of connection is a steel plate cast into the wall to which the steel beams of the floor structure can be connected Shear studs are usually provided on the back of the plate to resist the vertical reaction from the floor beam Axial forces in the beam are resisted by reinforcing bars which are generally welded to the plate29 1 2022 nbsp 0183 32 Steel Column Base Plate Steel Column Base Plate version 0 0 4 February 2 2022 Project Designer Member Dimensions Section Designation This information must be read or used in conjunction with CAN CSA S16 01 Limit States Design of Steel Structures and the CISC Handbook of Steel Construction 9th ed

Structural Shapes – standard steel configurations produced by steel mills such as wide flanges channels angles pipe tubes etc Structural Steel – the structural elements that make up the frame that are essential to supporting the design loads e g beams columns braces plate trusses and fasteners It does not include for example 3 2 1 Example Concrete Slab on Columns 14 3 2 2 Concrete Slab on Steel Beams and Columns 16 3 2 3 Walls 17 3 2 4 Light Steel Construction 17 3 2 5 Roof Construction 18 3 2 6 Floor Construction 18 3 2 7 Sample Calculation of Dead Load for a Steel Roof 19Beam Column Base Plate Design area f steel c ncentrically bearing n a c ncrete N te that equati n 12 is n t a cl sed f rm s luti n be supp rt in cause maximum area f the p rti n f the supp rting is a functi n f surface that is ge metrically similar t and c n is a functi n f Tension Members Example 1 Calculating design strength using LRFD and allowable strength using ASD for plate in tension Example 2 Checking angle in tension with given service loads using LRFD and ASD Example 3 Calculate the design strength LRFD and allowable strength ASD for double angle in tension beam to column connections prEN1993 1 8 also includes design methods for column bases with end plate connections new rules for the interaction of moment and axial force at the connection new rules for calculating the bearing capacity of slotted holes welded connections to rectangular tubes and improved serviceability limits for pins

9 12 Steel plate stiffeners to increase the bearing capacity of the steel connection The next step for the column base plate connection design is to define the load cases The user can add more than one load cases by clicking on New 16 6 2011 nbsp 0183 32 Typical Column Bearing on Concrete Footing Note that the base plate is a double cantilever in TWO DIRECTIONS This means that flexural strength must be checked in both directions when choosing the plate thickness Selecting Length B and Width N of the Plate 4 6 Connection of I beam to hollow steel columns using diaphragm plates 591 4 6 1 Example 6 – I beam to hollow steel columns with diaphragm plates 591 5 Bracing connections 597 5 1 Introduction 597 5 2 Materials 597 5 3 Design and Detailing 597 5 3 1 Example 1 – Welding of steel rod to a steel plate 598Steel Bridge Bearing Design and Detailing Guidelines Section 1 Elastomeric Bearings 1 1 General Commentary This section is intended to assist in the design and detailing of elastomeric bridge bearings The information included is intended to permit efficient fabrication installation and maintenance of these bearings A W10 x 49 column is supported by a concrete pier whose top surface is 19 inches x 19 inches Design a base plate given that the column dead load is 100 kips and live load is 150 kips Base plate material is A36 steel and concrete compressive strength is 3 ksi

Direction of load transfer 1 Plate edge to first bolt row e1 fp 50 mm Pitch between bolt rows p1 fp 80 mm Pitch between bolt rows across joint p1 fp j 110 mm Direction perpendicular to load transfer 2 Plate edge to first bolt line e2 fp 55 capacity of steel base plate 32 9 3 DESIGN CHECK NO 3 Design capacity of weld at column base 34 Page 9 4 DESIGN CHECK NO 4 Design capacity for horizontal shear transfer by friction at base plate concrete interface 35 9 5 DESIGN CHECK NO 5 Design capacity for horizontal shear transfer by bearing of embedded steel column 36 9 6 DESIGN design is sensitive to tolerances which are recapitulated for beam to column connections and base plates in Chapter 8 The worked examples in Chapter 9 demonstrates the application of theory to design of pinned and moment resistant base plates pinned and moment resistance beam to column connections and the use of 2 DESIGN GUIDE 1 2ND EDITION BASE PLATE AND ANCHOR ROD DESIGN The vast majority of building columns are designed for axial compression only with little or no uplift For such col umns the simple column base plate connection detail shown in Figure 1 1 is sufﬁcient The design of column base platePRACTICAL DESIGN AND DETAILING OF STEEL COLUMN BASE PLATES 1 0 I NTRODUCTI ON 1 1 Preface Steel column base plates are one of the most ndament al parts o f a steel structure yet the design of base plates is commonly not given the attention that it should by engineers This results in base plate details that are expensive difficult to

Example 11 Design of a Column Base Plate A W10 x 49 column is supported by a concrete pier whose top surface is 19 inches x 19 inches Design a base plate given that the column dead load is 100 kips and live load is 150 kips Base plate material is A36 steel and concrete compressive strength is 3 ksi The plate was Example 6 LRFD Procedure A base plate is to be designed for a load of 480 kips using an older edition of selected for a W12 x 106 column with a dead load of 200 the AISC Specification with an allowable bearing stress kips and a live load of 360 kips The pier is 28 in square of is equal to 1 0 n edge distance for a column base plate n column base plate design value n a shorthand for neutral axis N bearing length on a wide flange steel section depth of a column base plate P name for load or axial force vector P a required axial force ASD P c available axial strength P e1 Euler buckling strength P r9 1 DESIGN CHECK Design capacity for bearing on concrete support 29 9 2 DESIGN CHECK NO 2 Design capacity of steel base plate 32 9 3 DESIGN CHECK NO 3 Design capacity of weld at column base 34 Page 9 4 DESIGN CHECK NO 4 Design capacity for horizontal shear transfer by friction at base plate concrete interface 35In this case the base plate may be designed as follows i Divide the factored column load by the design bearing strength of concrete and find the area of the base plate Select a convenient width of the base plate Width of base plate Depth of the column section 2 thickness of gusset plate 80 mm to 100 mm

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