The figure shows a cast-iron bearing block that is to be bolted to a steel ceiling joist and is to support a gravity load of 18 kN. Bolts used are M24 ISO 8.8 with coarse threads and with 4.6-mm-thick steel washers under the bolt head and nut. The joist flanges are 20 mm in thickness, and the dimension A, shown in the figure, is 20 mm. The modulus of elasticity of the bearing block is 135 GPa. 2) Find the wrench torque required if the fasteners are lubricated during assembly and the joint to be permanent. 5) Determine the factors of safety guarding against yielding, overload, and joint separation.
The figure shows a cast-iron bearing block that is to be bolted to a steel ceiling joist and is to support a gravity load of 18 kN. Bolts used are M24 ISO 8.8 with coarse threads and with 4.6-mm-thick steel washers under the bolt head and nut. The joist flanges are 20 mm in thickness, and the dimension A, shown in the figure, is 20 mm. The modulus of elasticity of the bearing block is 135 GPa. 2) Find the wrench torque required if the fasteners are lubricated during assembly and the joint to be permanent. 5) Determine the factors of safety guarding against yielding, overload, and joint separation.
Mechanics of Materials (MindTap Course List)
9th Edition
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Barry J. Goodno, James M. Gere
Chapter1: Tension, Compression, And Shear
Section: Chapter Questions
Problem 1.8.10P: A steel punch consists of two shafts: upper shaft and lower shaft. Assume that the upper shaft has a...
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![The figure shows a cast-iron bearing block that
is to be bolted to a steel ceiling joist and is to
support a gravity load of 18 kN. Bolts used are M24
ISO 8.8 with coarse threads and with 4.6-mm-thick
steel washers under the bolt head and nut. The joist
flanges are 20 mm in thickness, and the dimension
A, shown in the figure, is 20 mm. The modulus of
elasticity of the bearing block is 135 GPa.
(a) Find the wrench torque required if the fasteners are lubricated during assembly and the joint is
to be permanent.
(b) Determine the factors of safety guarding against yielding, overload, and joint separation.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F8fc54e0d-fb94-4769-b33c-a0475da69730%2F8474be7c-015f-4757-a7fd-285af2fc70bb%2Fwfcjt8c_processed.jpeg&w=3840&q=75)
Transcribed Image Text:The figure shows a cast-iron bearing block that
is to be bolted to a steel ceiling joist and is to
support a gravity load of 18 kN. Bolts used are M24
ISO 8.8 with coarse threads and with 4.6-mm-thick
steel washers under the bolt head and nut. The joist
flanges are 20 mm in thickness, and the dimension
A, shown in the figure, is 20 mm. The modulus of
elasticity of the bearing block is 135 GPa.
(a) Find the wrench torque required if the fasteners are lubricated during assembly and the joint is
to be permanent.
(b) Determine the factors of safety guarding against yielding, overload, and joint separation.
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