29 Questions
What is an advantage of using fewer pieces in structural steel design?
Time is saved in detailing, fabrication, and field erection
How many main types of welding procedures are used in structural applications?
Four
What is another name for Shielded Metal Arc Welding (SMAW)?
Manual, stick, or hand welding
What is a characteristic of Gas Metal Arc Welding (GMAW)?
It is a fast and economical process
What is a feature of Flux Cored Arc Welding (FCAW)?
It uses a flux core
Which welding process may be automated?
Gas Metal Arc Welding (GMAW)
What is the primary method of performing structural welding?
By hand
Why are overhead welds often avoided?
Because they are slow and expensive to make
What is the role of gravity in the welding process?
It can speed up the welding process
What is the primary classification of welds based on?
The type of joint used
What is shown in Figure 5.2?
Weld positions
What type of stresses are used to control fillet welds according to the various specifications?
Shearing stresses
What is the desirable arrangement for welded connections?
Subjecting them to shearing stresses only
At what angle do fillet welds seem to fail when tested to failure with loads parallel to the weld axes?
45˚
What is the strength of fillet welds assumed to equal?
Design shearing stress times the theoretical throat area
What is the maximum size of a fillet weld for a material with a thickness of 1/4 in or more?
1/8 in
What is the theoretical throat area of a fillet weld equal to?
Theoretical throat distance times the length of the weld
What is shown in Figure 5.4?
Theoretical throats of several fillet welds
Why is it desirable to keep the weld at least 1/16 in from the edge of a plate?
To make it easier to inspect the weld's dimensions
What is the minimum length of a longitudinal fillet weld connecting plates or bars?
The perpendicular distance between the plates
What is the minimum amount of lap required for a lap joint?
Five times the thickness of the thinner part
What is the minimum size of a fillet weld for a material with a thickness of over 3/4 in?
5/16 in
Why is it not recommended to have a weld larger than the material thickness less 1/16 in?
Unless the weld is specially built out
What is the purpose of determining the effective length of an end-loaded fillet weld in the AISC Specification?
To account for stress variations along the weld
What is the value of β when the actual weld length is greater than 300 times the weld leg size?
0.6
What is the minimum tensile strength of E70 electrodes in the shielded metal arc process?
70 ksi
What is the direction of the load applied to the 1-in length of a 1/4-in fillet weld in Example 5-1?
Parallel to the weld length
What is the purpose of Example 5-3?
To present the design of a fillet welded connection
What is the factor that affects the determination of the effective length of an end-loaded fillet weld?
Ratio of weld length to weld leg size
Learn about the different welding methods used in structural applications, including Shielded Metal Arc Welding, Gas Metal Arc Welding, Flux Cored Arc Welding, and Submerged Arc Welding. This lecture from the Civil Engineering Department covers the basics of Welded Connections in Structural Steel Design.
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