Structural Steel Design (6th Edition)
6th Edition
ISBN: 9780134589657
Author: Jack C. McCormac, Stephen F. Csernak
Publisher: PEARSON
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Question
Chapter 12, Problem 12.12PFS
To determine
The number of bolts required for LRFD and ASD for the bearing type connection.
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Using bearing type connection, determine the number of25mm A490 bolts required, by LRFD only. Determine the design tensilestrength Pu and the allowable tensile strength Pa of the connection ifeight 25mm A325x bearing type bolts are used in each flange. Includeblock shear in your calculations. Use A36 steel for connecting members.
410UB 59.7 (Grade 300 Plus) Primary steel beam as shown in Figure below is connected to a column using a simple cleat plate connection. Primary beam needs to transfer an ultimate shear force, V* = 200 kN through the connection. Cleat plate connection details are shown in the Figure.Cleat plate - Grade 250 fy(cleat plate)=280 MPa, fup(cleat plate)=410 MPaBolts - four 8.8/S M20 bolts, threads are excluded from the shear plane,All bolt holes diameter is 22 mm. 8 mm thick 280X90 mm cleat plate is welded to column using 6 mm fillet welds(E48XX) both sides (strength of weld = 0.978 kN/m) ∅=0.9
a) Design shear capacity of beam web against tearing is
b)Calculate and verify the design shear capacity of cleat plate against tearing and bearing failure.
c) Check cleat plate against bearing failure.
d) Calculate stresses in the weld
A C15x40 channel section is bolted to a gusset plate is used to resist a tensile loadPu =313 k. The bolts are 3/4 inch diameter bolts A325 N (Group A, N Type) used insingle shear to resist this load. The bolts are to be symmetric and arranged in 3 rows.1) Determine the number of bolts needed for this connection. Draw a detailshowing how the bolts are arranged and showing spacing and edge distances onthis connection. Assume edge distance Le = 1.75db , use Le to nearest 1/4 in.2) If the connection is to be replaced by a fillet welded connection with transversewelds only along the channel web, determine the required fillet size to thenearest 16th of an inch.
Chapter 12 Solutions
Structural Steel Design (6th Edition)
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- Compute the net area. The 1 x 10 plate shown in Fig. P3-10.The holes are for 7/8-in Ø bolts.arrow_forwardThe truss member shown in the accompanying illustration consists of two C12 x 25s(A36 steel) connected to a 25 mm gusset plate. How many 22 mm A325 bolts (threads excludedfrom shear plane) are required to develop the full design tensile capacity of the member if it isused as a bearing-type connection? Assume U = 0.85. Use ASD method.arrow_forward3.6-3 Select a double-angle tension member to resist a service dead load of30 kips and a service live load of 90 kips. The member will be connectedwith two lines of 7⁄8-inch-diameter bolts placed at the workable gage distances(see Manual Table 1-7A). There will be more than three bolts in eachline. The member is 25 feet long and will be connected to a 3⁄8-inch-thickgusset plate. Use A572 Grade 50 steel.a. Use LRFD.arrow_forward
- How many bolts are required (LRFD and ASD) for the bearing-type connection shown if PD = 120 k and PL = 150 k? A490 3/4 in bolts, threads not excluded from shear planesarrow_forwardTwo steel plate tension members have been connected using 0.72 inch diameter bolts arranged in an equally-spaced 9 by 3 rectangular formation. Both plates have a thickness equal to 1/3 in. Take shear fracture stress as 51.2 ksi, clear distance for each edge bolt as 0.12 in, and the clear distance for the other bolts as 1.072 in. a)Sketch the connection showing all the details and measurements with units. b)Find the maximum allowable service dead load and live load assuming live load is half as much as dead load. Consider ASD.arrow_forwardPlz, solve this problem as detail as you can? Steel Structure Design a concentrically loaded bolted connection with the following given information. Also verify your design and draw s sketch showing final layout of the connection. Size and type of bolts: 3/4-in A325 (Group A) bolts in standard-size holes with threads excluded from the shear plane in a bearing-type connection shown in figure 1. Use Fu= 58 ksi and assume edge distances to be 2 in and the distance center-to-center of holes to be 3 in, Assume that deformation at bolt holes is a design consideration. Pu = 345 k using LRFDarrow_forward
- An L 150 x 100 x 16 is used as a tension member, with one gage line of 20 mm bolts in each leg at the usual gage location (Table3.1, where g=60 mm, g1=55 mm, and g2=60mm). Two rows of bolts are used in the long leg, and one in the short leg. What is the net area of the given steel connection? Stagger, s=58.63mm (Key Answer: An=3,008.00 mm)arrow_forwardDead load=35kips Live load=60kips Three bolts on two lines spaced at 3.5 in o.c Bolts are 3/4in standard holes Find the lightest S type (A36 steel) using AISC LRFD Specs This tension member is 15 ft longarrow_forwardQ1) A bracket must support the service loads applied at angle given in table below, which act through the center of gravity of the connection. The connection to the column flange is with 4 bolts of diameter given in table, bolts type is A325X. A992 steel is used for all components. Find the value of DL and Live load which make the connection safe , if you know that DL = 3 live load, angel 40 , bolt diameter 20arrow_forward
- Check the block shear capacity of the connection, use lrfd and asd design expression. Given the lightest W section from Plate 3, connected toa PL% x 10 on its top and bottom flanges, available to support working tensile loads of D = 420 kips and W = 330 kips. The member is to be 20 ft long and is assumed to have two lines of holes for 4-in diameter bolts in each flange. There will be at least three holes in each line 3 inches on center.arrow_forwardCompute the net area. The plate 7/8 x 14 shown in Fig. P3-11. The holes are for 7/8-in Ø bolts.arrow_forwardThe bracket connection shown in Figure must support an eccentric load consisting of 9 kips of dead load and 27 kips of live load. The connection was designed to have two vertical rows of four bolts, but one bolt was inadvertently omitted. If 7⁄8inchdiameter Group A bearingtype bolts are used, is the connection adequate? Assume that the bolt threads are in the plane of shear. Use A36 steel for the bracket, A992 steel for the W6 x 25, and perform the following analyses: (a) elastic analysis, (b) ultimate strength analysis.arrow_forward
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