DIVINE WORD COLLEGE OF LEGAZPI Last Name: ______________________

School of Engineering & Computer Studies First, M.I.: ______________________

South Campus, Albay District, Legazpi City 4500
Course & Year: ___________________
Bachelor of Science in Civil Engineering
Summer Semester, S.Y. 2024 – 2025
Date: ___________________________

CE PC SE 2- DESIGN OF STEEL STRUCTURES

MID TERM EXAM

SET A

Situation 1. (See Figure 1) A steel column W 300 mm 203 kg/m section is

subjected to an axial load of 2670 kN and moments from framing beams as
follows:
Mx at the top=108 kN.m.
Mx at the bottom= -108 kN.m.
Prop. Of the WF Column
A= 2570 mm2 tr= 32 mm
d= 340 mm Ix= 5.16x108 MPa
br= 315 mm Iy= 1.65x108 MPa
tw= 20 mm E= 200 GPa
Fy= 345.6 MPa
Unbraced column length= 3m
Effective length factor, K=1.0
Sidesway is prevented
1. What is the critical buckling load (kN)?
a. 36188 kN c. 36189 kN
b. 36190 kN d. 36187 kN
Situation 2. (See Figure 2) A 130 mm x 12 mm plate is used for tension
member. It is connected to a gusset plate with 4-16 mm diameter bolt as
shown. Assume Ae = An. Fy = 248 MPa and Fu = 345 MPa. Using NSCP 2015
provisions,
2. Which of the following gives the gross area?
a.1560 sq. mm. c. 1560 sq.m.
b.1080 sq. mm. d. 1326 sq.mm.
3. Which of the following gives the net area?
a.1560 sq. mm. c. 1560 sq.m.
b.1080 sq. mm. d. 1326 sq.mm.
Situation 3: (See Figure 4) Given the riveted connection shown if the
thickness of the plate is 12 mm. Diameter of rivets = 20 mm.
4. Which of the following the critical net area in sq.mm.?
a. 2926 c. 2930
b. 3060 d. 2928
Situation 4: (See Figure 5) A single angle tension member 150 mm x 100
mm x 20 mm has two gage lines in its long leg and one in the short leg
for 16–mm bolts. If the area of the angular section is 4480 mm2,
5. Which of the following the design net area in sq.mm.?
a. 3678 c. 3689
b. 3660 d. 3680
Situation 5: (See Figure 3) A 130 mm x 12 mm plate is used for tension
member. It is connected to a gusset plate with 4-16 mm diameter bolt
as shown. Assume Ae = An. Fy = 248 MPa and Fu = 345 MPa. Using NSCP
2015 provisions,
6. What is the design strength based on LRFD?
a. 186 c. 279
b. 187 d. 280
7. What is the design strength based on ASD?
a. 186 c. 279
b. 187 d. 280
 DIVINE WORD COLLEGE OF LEGAZPI Last Name: ______________________
School of Engineering & Computer Studies First, M.I.: ______________________
South Campus, Albay District, Legazpi City 4500
Course & Year: ___________________
Bachelor of Science in Civil Engineering
Summer Semester, S.Y. 2024 – 2025
Date: ___________________________

CE PC SE 2- DESIGN OF STEEL STRUCTURES

MID TERM EXAM

Situation 6: (See Figure 6) Given the following data of the slip-

critical tension connection shown with 22-mm diameter bolts in
standard holes with threads excluded from shear planes. Considering
the plates only, (Fy = 248 MPa, Fu = 400 MPa)
8. What is the design strength based on LRFD?
a. 1718 c. 1719
b. 1143 d. 1142
9. What is the design strength based on ASD?
a. 1718 c. 1719
b. 1143 d. 1142
Situation 7: A A36 steel (Fy = 248 MPa and Fu = 400 MPa) L 150 x 150 x
10 that is connected at its ends with one line of four 22- mm diameter
bolts in standard holes 75 mm on center in one leg of the angle.
Properties of L 150 x 150 x 10:
Ag=2,927.47 mm2
x =40.34 mm
10. What is the design strength based on LRFD?
a. 438 c. 653
b. 656 d. 435
11. What is the design strength based on ASD?
a. 438 c. 653
b. 656 d. 435
Situation 8: (See Figure 7) The A572 Grade 50 (Fy = 345 MPa, Fu = 448
MPa) tension member shown is connected with three 18-mm bolts.
Properties of L 150 x 90 x 12:
Ag = 2,751.45 mm2
x =21.16 mm
10. What is the LRFD design block shear rupture strength?
a. 673 c. 680
b. 449 d. 450
11. What is the ASD allowable block shear rupture strength?
a. 673 c. 680
b. 449 d. 450
Situation 9: (See Figure 8) Given the following data of the butt
connection shown:
Dimensions:
s1 = 50 mm; s2 = 100 mm; s3 = 50 mm; s4 = 90 mm t1 = 20 mm; t2 = 12 mm
Allowable stresses:
Shear on bolt = 117 MPa
Tension on net area of plate = 220 MPa
Tension on gross area of plate = 148 MPa
Bearing on plate = 338 MPa
12. What is the minimum required bolt diameter (mm) based on bolt shear
when P = 320 kN.
a. 16 c. 25
b. 22 d. 20
13. What is the maximum bolt hole diameter (mm) based on tension on plate
when P = 320 kN
a. 65 c. 60
b. 45 d. 50
14. What is the minimum bolt diameter (mm) based on bearing on plate
 DIVINE WORD COLLEGE OF LEGAZPI Last Name: ______________________
School of Engineering & Computer Studies First, M.I.: ______________________
South Campus, Albay District, Legazpi City 4500
Course & Year: ___________________
Bachelor of Science in Civil Engineering
Summer Semester, S.Y. 2024 – 2025
Date: ___________________________

CE PC SE 2- DESIGN OF STEEL STRUCTURES

MID TERM EXAM

when P = 480 kN.

a. 20 c. 22
b. 16 d. 25
Situation 10: Define the following terms.
15. The ability of the material to deform under tensile stress.
a. malleability c. toughness
b. ductility d. resilience
16. The ability of a material to absorb energy when it is deformed
elastically and release that energy upon loading.
a. toughness c. elasticity
b. stiffness d. resilience
17. The ability of a material to absorb energy and plastically deform
without fracturing.
a. resilience c. toughness
b. stiffness d. elasticity
18. When a material is subjected to repeated cycle of stress or strain,
what cause its structure to breakdown ultimately leading to fracture?
a. creep c. fatigue
b. plasticity d. yielding
19. In what condition is a material when it breaks down and deforms
permanently even due to a slight increase in stress above the elastic
limit?
a. plasticity c. yielding
b. fatigue d. creep
20. The material returns to its original shape when the load is removed.
a. buckling c. plasticity
b. elasticity d. resilience
 DIVINE WORD COLLEGE OF LEGAZPI Last Name: ______________________
School of Engineering & Computer Studies First, M.I.: ______________________
South Campus, Albay District, Legazpi City 4500
Course & Year: ___________________
Bachelor of Science in Civil Engineering
Summer Semester, S.Y. 2024 – 2025
Date: ___________________________

CE PC SE 2- DESIGN OF STEEL STRUCTURES

MID TERM EXAM

FIGURES

Figure 2

Figure 1

Figure 3
Figure 4

Figure 5
DIVINE WORD COLLEGE OF LEGAZPI Last Name: ______________________
School of Engineering & Computer Studies First, M.I.: ______________________
South Campus, Albay District, Legazpi City 4500
Course & Year: ___________________
Bachelor of Science in Civil Engineering
Summer Semester, S.Y. 2024 – 2025
Date: ___________________________

CE PC SE 2- DESIGN OF STEEL STRUCTURES

MID TERM EXAM

Figure 6

“Whatever you do, work at it

with all your heart, as working
for the Lord, not for human
masters…” — Colossians 3:23

Figure 7

Figure 8