Net sectional area of a tension member is equal to its gross sectiona...
The net area at any section is equal to the gross area minus the deduction for holes at that section. The deduction for the hole is the product of the hole diameter and the thickness of the material.
View all questions of this test
Net sectional area of a tension member is equal to its gross sectiona...
Net Sectional Area of a Tension Member
The net sectional area of a tension member refers to the effective cross-sectional area that is available to resist the applied tensile forces. It is important to determine the net sectional area accurately in order to calculate the strength and capacity of the member.
Gross Sectional Area: The gross sectional area of a tension member is the total cross-sectional area of the member without considering any openings or holes.
Rivet Holes: In many cases, tension members are connected using rivets. These rivets create holes in the member, which need to be accounted for when calculating the net sectional area.
Calculation of Net Sectional Area: The correct formula to calculate the net sectional area of a tension member is to subtract the area of the rivet holes from the gross sectional area.
Explanation of the Correct Answer (Option D):
Option D states that the net sectional area is equal to the gross sectional area minus the area of the rivet holes. This is the correct answer because when calculating the net sectional area, the area of the rivet holes needs to be deducted from the gross sectional area.
- Gross Sectional Area
The gross sectional area is the total cross-sectional area of the tension member, including any openings or holes. It represents the physical size of the member.
- Area of Rivet Holes
The area of the rivet holes refers to the total area occupied by the holes created by the rivets. These holes weaken the member and reduce its effective cross-sectional area.
- Net Sectional Area Calculation
To calculate the net sectional area, the area of the rivet holes needs to be deducted from the gross sectional area. This is because the area occupied by the holes is not available to resist the applied tensile forces.
Therefore, the correct formula to calculate the net sectional area is:
Net Sectional Area = Gross Sectional Area - Area of Rivet Holes
By subtracting the area of the rivet holes from the gross sectional area, we obtain the effective cross-sectional area that can resist the tensile forces. This net sectional area is a crucial parameter in determining the strength and capacity of the tension member.
Hence, the correct answer is option D, which states that the net sectional area is equal to the gross sectional area minus the area of the rivet holes.