The effects of low-intensity heat sources on the strength of the weld needs to be explained. Concept Introduction: Welding is a process of joining two metals by melting a filler material at the joint. During welding, the filler material is heated to a high temperature and deposited on the base material. Solidification is a process of forming crystal structure from the molten metal. The solidification time is the time required to solidify the metal completely.

Question

1. A W10x60 with sections properties shown is to be used as a column. If the unsupported length is 5.0m, find the Safe Axial Load that can be carried by the section. Use Fy=248 MPa and K=1.50 (35pts) Section Properties: A = 11355 mm2 Ix = 142x106 mm4 rx = 111.51 mm Iy = 48 x 106 mm4 ry = 65.28 mm 2. A Steel Column will be required to carry a total load of 500KN. If a tubular section will be utilized and the required dimension must not exceed 400x400, what will be the required thickness of the section (tf=tw). Use Fy=248 MPa L=4.5m, K=1.0 and 80% of initial fa will be used. (50pts) Note: Plate thickness available are: 2mm, 3mm, 4mm, 6mm, 8mm and 10mm 3. A steel tension rod will be subjected to a tension load of 320 KN. What will be the required diameter of the rod if Fy=248 MPa (15pts)

Answer 1

Question

Chapter 9, Problem 9.109P

Interpretation Introduction

Interpretation:

The effects of low-intensity heat sources on the strength of the weld needs to be explained.

Concept Introduction:

Welding is a process of joining two metals by melting a filler material at the joint.

During welding, the filler material is heated to a high temperature and deposited on the base material.

Solidification is a process of forming crystal structure from the molten metal. The solidification time is the time required to solidify the metal completely.

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1. A W10x60 with sections properties shown is to be used as a column. If the unsupported length is 5.0m, find the Safe Axial Load that can be carried by the section. Use Fy=248 MPa and K=1.50 (35pts) Section Properties: A = 11355 mm2 Ix = 142x106 mm4 rx = 111.51 mm Iy = 48 x 106 mm4 ry = 65.28 mm 2. A Steel Column will be required to carry a total load of 500KN. If a tubular section will be utilized and the required dimension must not exceed 400x400, what will be the required thickness of the section (tf=tw). Use Fy=248 MPa L=4.5m, K=1.0 and 80% of initial fa will be used. (50pts) Note: Plate thickness available are: 2mm, 3mm, 4mm, 6mm, 8mm and 10mm 3. A steel tension rod will be subjected to a tension load of 320 KN. What will be the required diameter of the rod if Fy=248 MPa (15pts)

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