1. 55
2. 57
3. 59
4. 61
61
1. 70 years
2. 75 years
3. 80 years
4. 85 years
80 years
1. 30 kN/m
2. 35 kN/m
3. 40 kN/m
4. 45 kN/m
30 kN/m
1.
2.
3.
4.
1. 2.0
2. 2.1
3. 2.2
4. 2.3
2.0
1. 500 kN
2. 425 kN
3. 250 kN
4. 75 kN
250 kN
1. 47.5 kPa
2. 47.6kPa
3. 47.7 kPa
4. 47.8kPa
47.8kPa
1. 26.7 MPa and 172.5 MPa
2. 54 MPa and 128 MPa
3. 67.5 MPa and 213.3 MPa
4. 16 MPa and 138 MPa
26.7 MPa and 172.5 MPa
1. 1/2
2. 1
3. √2
4. 2
1
1. 2,000N/m2
2. 10,000N/m2
3. 19,620N/m2
4. 98,100N/m2
10,000N/m2