8. Two flat jacks, 12 in. square, are placed in the wall and roof of an approxi- mately circular test gallery 8 ft in diameter. Flat jack 1 is horizontal, and placed in the side wall. Flat jack 2 is vertical, with its edge parallel to the axis of the gallery. The cancellation pressures measured were 2500 psi with FJ 1 and 900 psi with FJ 2. Estimate the initial stresses (vertical and hori- zontal). List your assumptions.
8. Two flat jacks, 12 in. square, are placed in the wall and roof of an approxi- mately circular test gallery 8 ft in diameter. Flat jack 1 is horizontal, and placed in the side wall. Flat jack 2 is vertical, with its edge parallel to the axis of the gallery. The cancellation pressures measured were 2500 psi with FJ 1 and 900 psi with FJ 2. Estimate the initial stresses (vertical and hori- zontal). List your assumptions.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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![8. Two flat jacks, 12 in. square, are placed in the wall and roof of an approxi-
mately circular test gallery 8 ft in diameter. Flat jack 1 is horizontal, and
placed in the side wall. Flat jack 2 is vertical, with its edge parallel to the
axis of the gallery. The cancellation pressures measured were 2500 psi with
FJ 1 and 900 psi with FJ 2. Estimate the initial stresses (vertical and hori-
zontal). List your assumptions.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbd4a40d4-5a23-4e02-8360-d642fe791a28%2F27badb68-bac7-48c9-bdcb-522b5a34a0f9%2F69xm3kd_processed.jpeg&w=3840&q=75)
Transcribed Image Text:8. Two flat jacks, 12 in. square, are placed in the wall and roof of an approxi-
mately circular test gallery 8 ft in diameter. Flat jack 1 is horizontal, and
placed in the side wall. Flat jack 2 is vertical, with its edge parallel to the
axis of the gallery. The cancellation pressures measured were 2500 psi with
FJ 1 and 900 psi with FJ 2. Estimate the initial stresses (vertical and hori-
zontal). List your assumptions.
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