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AWS D1.1 Endorsement study materials
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AWS D1.1 Endorsement practice questions

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Question 1AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

What is the minimum fillet weld size permitted by AWS D1.1 for joining a part whose thickness at the joint is 1/2 in?

  1. 1/4 in
  2. 1/8 in
  3. 3/16 in Correct answer.
  4. 5/16 in

Explanation

AWS D1.1 sets the minimum fillet weld size from the thickness of the thicker part joined at the joint. For thickness over 1/4 in through 1/2 in, the minimum permitted fillet weld size is 3/16 in.

Question 2AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

A fillet weld has equal legs of 5/16 in. What is its effective throat?

  1. 0.313 in
  2. 0.156 in
  3. 0.221 in Correct answer.
  4. 0.625 in

Explanation

For an equal-leg fillet weld, the effective throat is 0.707 times the leg size. Multiplying 0.707 by 0.3125 in gives approximately 0.221 in.

Question 3AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

For a fillet-welded lap joint, what is the minimum required overlap?

  1. Four times the thinner part thickness, but not less than 1 in
  2. Three times the thinner part thickness, but not less than 3/4 in
  3. Five times the thinner part thickness, but not less than 1 in Correct answer.
  4. Two times the thinner part thickness, but not less than 1/2 in

Explanation

AWS D1.1 requires the overlap of a fillet-welded lap joint to be at least five times the thickness of the thinner part joined. In no case may the overlap be less than 1 in.

Question 4AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

Which document states the welding variables to be used in production, such as process, electrode, current, and position?

  1. The welding procedure specification (WPS) Correct answer.
  2. The contract drawing
  3. The welder performance qualification record
  4. The procedure qualification record (PQR)

Explanation

The WPS is the written production document that gives the welding variables the welder is to follow. The PQR records the variables actually used to qualify the procedure, not the production instructions.

Question 5AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

Under what condition may a WPS be used without procedure qualification testing?

  1. When the electrode is E70XX
  2. When the welder has at least five years of experience
  3. When the inspector approves it verbally
  4. When it is prequalified under Chapter 3 and follows prequalified joint details Correct answer.

Explanation

A prequalified WPS is exempt from procedure qualification testing only when it complies with the prequalified requirements of Chapter 3, including the use of prequalified joint details and essential variables. Experience, verbal approval, or electrode type alone does not create an exemption.

Question 6AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

A fillet weld is placed along the edge of a plate that is 3/8 in thick. What is the maximum permitted fillet weld size at that edge?

  1. 1/4 in
  2. 5/16 in Correct answer.
  3. 3/8 in
  4. 7/16 in

Explanation

For material 1/4 in or thicker, the maximum fillet weld size along an edge is the material thickness minus 1/16 in. For a 3/8 in plate this gives 3/8 minus 1/16, or 5/16 in.

Question 7AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

A welder qualified under D1.1 stops welding with the qualified process. After how long without welding with that process must the welder requalify?

  1. Three months
  2. Twelve months
  3. Twenty-four months
  4. Six months Correct answer.

Explanation

AWS D1.1 maintains welder qualification through continuity of use. If the welder has not used the process for six months or more, requalification is required.

Question 8AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

What does a complete joint penetration (CJP) groove weld accomplish?

  1. It fills only the upper half of the joint depth
  2. It extends through the full thickness Correct answer.
  3. It is used only with a backing bar
  4. It has a fillet weld on each side

Explanation

A complete joint penetration groove weld extends through the full thickness of the joined parts. It does not depend on the presence of a backing bar, although backing may be used.

Question 9AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

What is the minimum length required for a fillet weld under D1.1?

  1. Four times its nominal size, but not less than 1-1/2 in Correct answer.
  2. Three times its nominal size, but not less than 1 in
  3. Six times its nominal size, but not less than 2 in
  4. Two times its nominal size, but not less than 1 in

Explanation

D1.1 requires a fillet weld to have a length of at least four times its nominal size. The length must also be at least 1-1/2 in.

Question 10AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

A proposed joint detail is not listed among the prequalified details in D1.1. What must be done before it is used for production welding?

  1. The WPS must be qualified by testing under Chapter 4 Correct answer.
  2. The joint must be welded only in the flat position
  3. The weld size must be increased by one pass
  4. The engineer must approve the welder's previous work

Explanation

Prequalified status applies only to details covered by the prequalified joint requirements. A detail outside those requirements requires procedure qualification by testing before production use.

Question 11AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

In D1.1 connection design, a fillet weld is normally proportioned to resist which type of stress on its effective throat?

  1. Shear Correct answer.
  2. Tension
  3. Compression
  4. Bending

Explanation

Fillet welds are designed on their effective throat to resist shear stress. The effective area is the effective throat multiplied by the effective length.

Question 12AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

Two 1/4 in equal-leg fillet welds, each 10 in long, are placed on opposite sides of a T-joint. What is the total effective area of the two welds?

  1. 5.00 in²
  2. 1.77 in²
  3. 7.07 in²
  4. 3.54 in² Correct answer.

Explanation

The effective throat of each 1/4 in equal-leg fillet is 0.707 times 0.25 in, or about 0.1768 in. One weld has an effective area of about 1.768 in², so two welds provide about 3.54 in².

Question 13AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

In a welding symbol, what is the tail used to indicate?

  1. The specification or process Correct answer.
  2. The weld size
  3. The opposite side
  4. The groove angle

Explanation

The tail of a welding symbol may reference the specification, process, or procedure governing the weld. Weld size and groove angle are shown at other locations on the symbol.

Question 14AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

A small flag at the junction of the reference line and the arrow in a welding symbol indicates what?

  1. A weld all around
  2. A flush weld
  3. A field weld Correct answer.
  4. A backing weld

Explanation

The flag at the reference-line/arrow junction denotes a field weld, meaning the weld is made at the installation site rather than in the shop. Other conditions such as all-around or flush contours use different symbol elements.

Question 15AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

What must a procedure qualification record (PQR) document?

  1. The welder's employment history
  2. The actual welding variables used Correct answer.
  3. The production schedule for the shop
  4. The cost of the electrodes

Explanation

The PQR records the actual variables used to produce the test weld that qualified the procedure. It supports the WPS but is not a production schedule or a cost record.

Question 16AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

Under D1.1, who is responsible for selecting the type and size of welds in a connection?

  1. The electrode manufacturer
  2. The Engineer Correct answer.
  3. The inspector
  4. The welder

Explanation

The Engineer is responsible for the design of the connection, including the weld type and size required to carry the design forces. The fabricator follows the design and the inspector verifies compliance.

Question 17AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

When the contract documents and AWS D1.1 differ on a project requirement, which governs?

  1. The contract documents Correct answer.
  2. AWS D1.1 always
  3. The fabricator's WPS
  4. The inspector's written instruction

Explanation

AWS D1.1 is a general code, and the contract documents govern the specific project requirements. Where there is a conflict, the contract documents take precedence.

Question 18AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

Where end returns are required on a fillet weld, what minimum length is normally provided?

  1. Equal to the weld size
  2. Twice the weld size Correct answer.
  3. Four times the weld size
  4. One-half the weld size

Explanation

When a fillet weld requires an end return, the return is continued around the corner for a length of at least twice the weld size. This helps avoid leaving a crater at the end of the weld.

Question 19AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

A plug weld is to be made in a part that is 1/2 in thick. What is the minimum permitted diameter of the plug weld?

  1. 5/8 in
  2. 13/16 in Correct answer.
  3. 1 in
  4. 3/4 in

Explanation

D1.1 requires the plug weld diameter to be at least the thickness of the part containing it plus 5/16 in, and never less than 5/8 in. For 1/2 in thickness, 1/2 plus 5/16 equals 13/16 in.

Question 20AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

What is the primary purpose of a weld access hole in a beam-to-column connection?

  1. To reduce the weight of the beam
  2. To allow the beam to be bolted after welding
  3. To provide room for welding and inspection Correct answer.
  4. To increase the effective throat of the weld

Explanation

A weld access hole provides clearance so the welder can reach the root of the joint and so the inspector can examine the completed weld. It is a detailing feature, not a means of increasing weld throat.

Question 21AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

A fillet weld with equal legs of 1/2 in is made in a skewed T-joint having a 60° dihedral angle. What is the effective throat?

  1. 1/2 in
  2. 0.354 in
  3. 1/4 in Correct answer.
  4. 0.433 in

Explanation

For a skewed T-joint, the effective throat is the leg size times the sine of half the dihedral angle. Here 0.5 in times sine 30° equals 0.25 in.

Question 22AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

A fillet weld is placed along the edge of a plate that is 3/16 in thick. What is the maximum permitted weld size at that edge?

  1. 1/8 in
  2. 1/4 in
  3. 5/16 in
  4. 3/16 in Correct answer.

Explanation

For material thinner than 1/4 in, the maximum fillet weld size along an edge is limited to the material thickness. A 3/16 in plate therefore permits a maximum edge fillet of 3/16 in.

Question 23AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

A prequalified WPS is written for E70XX electrodes. The fabricator wants to substitute E80XX electrodes without qualification testing. Is this permitted?

  1. Yes, because the process remains the same
  2. No, because E80XX cannot be used in D1.1
  3. No, because electrode classification is an essential variable Correct answer.
  4. Yes, because E80XX has higher strength

Explanation

A change in electrode classification is an essential variable for procedure qualification. Substituting E80XX for E70XX therefore requires appropriate qualification unless the WPS is revised and qualified for the new classification.

Question 24AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

Two plates of different thickness, 1/4 in and 3/4 in, are joined by a fillet weld. What minimum fillet weld size does D1.1 require?

  1. 5/16 in
  2. 3/16 in
  3. 1/4 in Correct answer.
  4. 1/8 in

Explanation

Minimum fillet weld size is based on the thickness of the thicker part joined. For a 3/4 in thicker part, the table requires a minimum fillet weld size of 1/4 in.

Question 25AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

A 3/16 in fillet weld is specified with a length of 1 in. Does it satisfy the D1.1 minimum length requirement?

  1. Yes, because the length exceeds the weld size
  2. Yes, because four times the size is 3/4 in
  3. No, the minimum is 2 in
  4. No, the minimum is 1-1/2 in Correct answer.

Explanation

The required length is the greater of four times the weld size and 1-1/2 in. Four times 3/16 in is 3/4 in, but the absolute minimum of 1-1/2 in controls, so 1 in is too short.

Question 26AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

AWS D1.1/D1.1M applies to welded structural steel having a minimum thickness of what value?

  1. 3/16 in [5 mm]
  2. 1/4 in [6 mm]
  3. 1/16 in [1.5 mm]
  4. 1/8 in [3 mm] Correct answer.

Explanation

AWS D1.1/D1.1M is the structural steel welding code, and its scope begins at 1/8 in [3 mm] thickness. Thinner sheet steel is normally covered by other AWS codes, such as D1.3. The other values are either below the scope or simply not the stated minimum.

Question 27AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

In the electrode classification E7018, what does the 70 represent?

  1. Minimum yield strength of 70 ksi
  2. Maximum carbon content of 0.70%
  3. Minimum tensile strength of 70 ksi Correct answer.
  4. Welding current of 70 A

Explanation

In the E70XX classification, the first two digits after E give the minimum tensile strength in ksi. Thus E70 electrodes have a minimum tensile strength of 70 ksi. The final two digits describe coating, current, and usability rather than strength.

Question 28AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

What does a circle at the junction of the reference line and the arrow of a welding symbol indicate?

  1. Field weld
  2. Backing required
  3. Tail reference
  4. Weld all around Correct answer.

Explanation

A circle at the junction of the reference line and arrow means the weld is to be made all around the joint. A flag at that same location indicates a field weld, not an all-around weld.

Question 29AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

On an AWS welding symbol for a fillet weld, where is the weld size placed?

  1. To the right of the fillet weld symbol
  2. In the tail
  3. Above the reference line only
  4. To the left of the fillet weld symbol Correct answer.

Explanation

AWS welding symbols place the weld size to the left of the weld symbol and the weld length to the right. The tail is used for supplemental references, not for the size.

Question 30AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

What is the primary purpose of a welding procedure specification (WPS)?

  1. To list the inspector's qualifications
  2. To specify the contract price
  3. To give written instructions for making production welds Correct answer.
  4. To record a welder's test results

Explanation

A WPS is the written procedure that tells the welder how to make the production weld, including variables such as process, filler metal, current, and position. It is not a welder qualification record; that is a separate document.

Question 31AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

What is the minimum permitted fillet weld size for a joint in which the thicker part is 1/4 in [6 mm] thick?

  1. 5/16 in [8 mm]
  2. 3/16 in [5 mm]
  3. 1/8 in [3 mm] Correct answer.
  4. 1/4 in [6 mm]

Explanation

D1.1 minimum fillet weld size is based on the thickness of the thicker part joined. For a thicker part of 1/4 in [6 mm], the minimum fillet size is 1/8 in [3 mm]. Larger sizes are permitted only if required by design, not by this minimum rule.

Question 32AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

What is the minimum overlap required for a fillet-welded lap joint under D1.1?

  1. Two times the thickness of the thinner part
  2. Eight times the thickness of the thinner part
  3. Five times the thickness of the thinner part, but not less than 1 in [25 mm] Correct answer.
  4. Three times the thickness of the thinner part

Explanation

D1.1 requires the overlap in a fillet-welded lap joint to be at least five times the thickness of the thinner part. In no case may the overlap be less than 1 in [25 mm]. The other multipliers do not satisfy the code minimum.

Question 33AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

A partial joint penetration (PJP) groove weld is best described as a groove weld that:

  1. Does not penetrate through the full thickness of the joint Correct answer.
  2. Penetrates through the full thickness of the thinner part
  3. Requires no root opening
  4. Is made only in the flat position

Explanation

A PJP groove weld extends into the joint only partway through the thickness; it does not achieve full joint penetration. A CJP weld, by contrast, penetrates through the full thickness of the thinner part.

Question 34AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

What does it mean when a WPS is "prequalified" under D1.1?

  1. It conforms to code requirements and may be used without procedure qualification testing Correct answer.
  2. It was written by the Engineer
  3. It has passed all required mechanical tests
  4. It applies only to fillet welds

Explanation

A prequalified WPS is one that follows the code's prequalified joint details and essential variable limits, so it may be used without procedure qualification testing. If those limits are exceeded, the WPS must be qualified by testing.

Question 35AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

A fillet weld symbol is placed above the reference line. On which side of the joint is the weld to be made?

  1. Arrow side
  2. The side selected by the welder
  3. Other side Correct answer.
  4. Both sides

Explanation

In AWS symbols, a weld symbol below the reference line applies to the arrow side, and a symbol above the reference line applies to the other side. The welder does not choose the side independently.

Question 36AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

In the welding symbol for an intermittent fillet weld, a dimension shown as 2-6 means the second number (6) is what?

  1. Root opening
  2. Length of each weld segment
  3. Pitch or center-to-center spacing of segments Correct answer.
  4. Weld size in sixteenths

Explanation

Intermittent fillet welds are dimensioned as length-pitch, for example 2-6. The first number is the length of each segment and the second is the pitch, or center-to-center spacing, between segments.

Question 37AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

Using D1.1 allowable stress design, what is the allowable shear stress on the effective throat of an E70 fillet weld?

  1. 21 ksi [145 MPa] Correct answer.
  2. 14 ksi [97 MPa]
  3. 70 ksi [483 MPa]
  4. 30 ksi [207 MPa]

Explanation

D1.1 allowable shear stress for fillet welds is 0.30 times the electrode's minimum tensile strength. For an E70 electrode, 0.30 × 70 ksi = 21 ksi. The 70 ksi value is the electrode tensile strength, not the allowable shear stress.

Question 38AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

What is the minimum length of each segment of an intermittent fillet weld under D1.1?

  1. 4 in [100 mm]
  2. 1-1/2 in [38 mm] Correct answer.
  3. 1 in [25 mm]
  4. 2 in [50 mm]

Explanation

Each segment of an intermittent fillet weld must be at least 1-1/2 in [38 mm] long. It must also satisfy the general minimum length of four times the weld size. A 1 in segment is shorter than the absolute minimum.

Question 39AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

For a PJP groove weld, the effective throat is normally taken as what dimension?

  1. The root opening plus the reinforcement
  2. The depth of the groove or preparation Correct answer.
  3. The face width of the weld
  4. The full thickness of the thinner part

Explanation

For a PJP groove weld, the effective throat is the depth of the groove or preparation, because the weld intentionally does not penetrate the full joint thickness. Full thickness would describe a CJP weld.

Question 40AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

What is the purpose of backgouging before welding the second side of a double-groove joint?

  1. To reduce the weld size
  2. To increase the root opening
  3. To preheat the base metal
  4. To remove unsound metal at the root and reach sound weld metal Correct answer.

Explanation

Backgouging removes the unsound root metal from the first side before welding the second side. This exposes sound weld or base metal so the completed joint has proper root fusion.

Question 41AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

What is the primary function of a backing bar in a groove weld?

  1. To support the root pass and help control penetration Correct answer.
  2. To replace the root pass
  3. To increase the effective throat
  4. To cool the weld rapidly

Explanation

A backing bar supports the molten root pass and helps control penetration. It may remain in place or be removed depending on the joint detail, but its primary role is root support.

Question 42AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

Which of the following is an essential variable for a WPS under D1.1?

  1. Project name
  2. Electrode classification Correct answer.
  3. Inspector's certification number
  4. Welder's name

Explanation

Electrode classification is an essential variable because changing from, for example, E70 to E80 can change strength, toughness, and operating characteristics. The welder's name, inspector's number, and project name are administrative, not WPS essential variables.

Question 43AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

In a welder performance qualification test position such as 3G, what does the letter G indicate?

  1. Gas shielded
  2. Gouged joint
  3. Groove weld Correct answer.
  4. Gravity position

Explanation

In welder qualification test positions, G denotes a groove weld and F denotes a fillet weld. Thus 3G is a vertical groove test position.

Question 44AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

What is the minimum dihedral angle for a skewed T-joint fillet weld to be prequalified under D1.1?

  1. 60° Correct answer.
  2. 90°
  3. 30°
  4. 45°

Explanation

D1.1 prequalified skewed T-joint fillet welds are limited to dihedral angles from 60° to 135°. A joint with a smaller dihedral angle must be qualified by testing rather than treated as prequalified.

Question 45AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

What is the minimum included angle for a prequalified single-V groove weld?

  1. 60° Correct answer.
  2. 90°
  3. 30°
  4. 45°

Explanation

A prequalified single-V groove weld must have an included angle of at least 60°. Angles below 60° require qualification by testing.

Question 46AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

Under D1.1, contract drawings for welded construction must show which of the following?

  1. Only the base metal specification
  2. Only the preheat temperature
  3. Only the welder's name
  4. Type, size, length, and location of welds Correct answer.

Explanation

Contract drawings must convey the welding requirements clearly, including weld type, size, length, and location. Base metal alone is insufficient because the fabricator cannot determine what welds to make.

Question 47AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

What is the minimum center-to-center spacing of plug welds under D1.1?

  1. Four times the hole diameter Correct answer.
  2. Six times the hole diameter
  3. Three times the hole diameter
  4. Two times the hole diameter

Explanation

D1.1 requires plug welds to be spaced at least four hole diameters apart, center to center. Closer spacing would overlap the heat-affected zones and is not permitted for prequalified plug welds.

Question 48AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

A plug weld is made in a part 1/2 in [13 mm] thick. What is the maximum permitted diameter of the plug weld hole?

  1. 1/2 in [13 mm]
  2. 3/4 in [19 mm]
  3. 9/16 in [14 mm]
  4. 5/8 in [16 mm] Correct answer.

Explanation

The maximum plug weld hole diameter is the thickness of the part plus 1/8 in [3 mm]. For a 1/2 in part, the maximum is 5/8 in. The 9/16 in value is the minimum diameter, not the maximum.

Question 49AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

A PJP groove weld has an effective throat of 5/16 in [8 mm] and a length of 8 in [200 mm]. What is its effective area?

  1. 5.0 in² [3226 mm²]
  2. 1.25 in² [806 mm²]
  3. 2.0 in² [1290 mm²]
  4. 2.5 in² [1613 mm²] Correct answer.

Explanation

Effective area equals effective throat times weld length. For a 5/16 in throat and an 8 in length, the area is 0.3125 × 8 = 2.5 in².

Question 50AWS D1.1/D1.1M Structural Steel Welding Code - general requirements, design of welded connections, and detailing

An E70 fillet weld has a 1/4 in [6 mm] leg and an effective length of 10 in [250 mm]. Using the D1.1 allowable shear stress of 21 ksi, what allowable load can the weld carry?

  1. 26.3 kips [117 kN]
  2. 52.5 kips [234 kN]
  3. 74.2 kips [330 kN]
  4. 37.1 kips [165 kN] Correct answer.

Explanation

The effective throat is 0.707 × 1/4 = 0.1768 in. The effective area is 0.1768 × 10 = 1.768 in², and the allowable load is 1.768 × 21 = 37.1 kips.