Select the lightest pair of C9 channels to support the loads PD= 50 k and PL = 90 k. The member is to be 20 ft long with bothends pinned and is to be arranged as shown in theaccompanying illustration. Use A36 steel and design singlelacing and end tie plates, assuming that 3/4 -in diameter boltsare to be used for connections. Assume that the bolts arelocated 1 1/4 in from the back of channels. Solve by LRFD andASD procedures.I6 in

Dead load, DL=50 kLive load, LL=90 kLength of the member is 20 ft.Grade of steel is A36Diameter of…

Select the lightest pair of C9 channels to support the loads PD = 50 k and PL = 90 k. The member is to be 20 ft long with both ends pinned and is to be arranged as shown in the accompanying illustration. Use A36 steel and design single acing and end tie plates, assuming that 3/4-in diameter bolts are to be used for connections. Assume that the bolts are ocated 1 1/4 in from the back of channels. Solve by LRFD and ASD procedures.

Select the lightest pair of C9 channels to support the loads PD = 50 k and PL = 90 k. The member is to be 20 ft long with both ends pinned and is to be arranged as shown in the accompanying illustration. Use A36 steel and design single acing and end tie plates, assuming that 3/4-in diameter bolts are to be used for connections. Assume that the bolts are ocated 1 1/4 in from the back of channels. Solve by LRFD and ASD procedures.

Steel Design (Activate Learning with these NEW titles from Engineering!)

6th Edition

ISBN:9781337094740

Author:Segui, William T.

Publisher:Segui, William T.

Chapter3: Tension Members

Section: Chapter Questions

Problem 3.6.2P

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Question

Select the lightest pair of C9 channels to support the loads PD
= 50 k and PL = 90 k. The member is to be 20 ft long with both
ends pinned and is to be arranged as shown in the
accompanying illustration. Use A36 steel and design single
lacing and end tie plates, assuming that 3/4 -in diameter bolts
are to be used for connections. Assume that the bolts are
located 1 1/4 in from the back of channels. Solve by LRFD and
ASD procedures.
I
6 in

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Step 3: Calculate the moment of inertia

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Step 4: find the minimum permissible using the formula given below;

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Step 5: Calculate the available strength for the column for LRFD

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Step 6: Calculate the available strength for the column for ASD

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Step 7: Design of end tie plates;

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Step 8: Design of single lacing ( LRFD );

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Step 9: Calculate the thickness of the member;

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Step 10: The required width using the area;

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