Chapter 3

Question 1

Types of conventional anchors

Answer 1

• Square-headed bolts
• Hex-headed bolts

Question 2

Conventional anchors

Answer 2

Usually embedded in the masonry during construction and require careful attention to bolt location and grip length requirements

Question 3

Types of proprietary anchors

Answer 3

• Expansion anchors
• Adhesive anchors

Question 4

Proprietary anchors

Answer 4

Typically installed after completion of construction, permit a larger degree of freedom in anchor placement

Question 5

Bent bar anchors

Answer 5

• Frequently used in masonry construction
• J or L shaped

Question 6

Plate anchors

Answer 6

Usually made by welding a square or circular steel plate perpendicular to the axis of a steel bar that is threaded on the opposite end

Question 7

Anchor bolts

Answer 7

Used as a means of tying structural elements together in construction

Question 7

Through bolts

Answer 7

• Extend completely through the thickness of the masonry
• Primarily used in industrial construction where aesthetics are not a principal concern

Question 8

Tension

Answer 8

Tensile capacity of an anchor is governed either by the strength of the masonry of by the strength of the anchor material

Question 9

Effective anchor embedded length

Answer 9

Length of embedment measured perpendicular from the surface of the masonry to the plate or head for plate anchors or headed bolts

Question 10

Shear

Answer 10

Anchor capacity is governed by either the masonry strength or the anchor material strength

Question 11

Combined tension and shear

Answer 11

Allowable combinations of tensile and shear loads are based on a linear interaction equation between the allowable pure tension and pure shear loads

Question 12

Proprietary anchor bolts

Answer 12

Average factors of safety: 4.0 for tensile test, 5.0 for shear test and 7.0 for combines tension and shear test