Building Construction Solving

Question 1

Estimate the number of hollow blocks required for the portion of a wall of a farm workshop which is 3.5 meters high
from the finished floor line and 20 meters long (excluding columns and beams). From the finished floor line the wall is
extended 0.6 meters lower for the wall footing. Add a contingency of 10%

Answer 1

Area x 13 CHB/m^2 + contingency
[(3.5+0.6) x 20] x 13 + {[(3.5+0.6) x 20] x 13 x 0.10}
= 1066 + 106.6
=1173 pcs

Question 2

A concrete sun drying floor is to be constructed. The floor area has a dimension 20 ft. wide by 40 ft. long. The thickness
of the floor is proposed to be 4 inches. A class A mixture will be adopted for the construction. Estimate the number of bags of cement using Tagayun’s Method, Estimate the number of bags of cement using Fajardo’s Method,

Answer 2

66 bags

68 bags

Question 3

An agricultural engineer had a previous building project having 500 sq.m. For a bagged storage warehouse and
amounting 6,000,000.00 pesos. If a new a project having 1,000 sq.m. is upcoming, what is the rough cost estimate of
the project?

Answer 3

12,000,000 pesos

Question 4

An agricultural engineer is asked to design a 30-sow level swine housing with a budget of 3,000,000 Php. If the building
floor area designed is 8.5m x 36m, estimate the cost of the building.

Answer 4

9803 Php/sq.m.

Question 5

Determine the force in member B of the gusset plate of a steel truss in an agricultural structure. The forces are
concurrent at O.

Determine the angle for equilibrium

Answer 5

14.3 kN

36 degrees

Question 6

Find the reaction Ax.
Find the reaction Ay.
Find the reaction Cx.
Find the reaction Cy.

Answer 6

285 kN
120 kN
195 kN
240 kN

Question 7

A carry concrete slat in the flooring of a swine housing is designed to carry swine up to 225 kg. The slat cross section is
100mm x 100mm (width x depth) and the span is 2.4m. Dead load is 0.243 kN/m, and live load is 2.5 kN/m. Assume simply
supported beam conditions.

Calculate the governing load combination using LRFD
Calculate the required shear strength (factored shear).
Calculate the required moment capacity (factored moment).
If the strength reduction factor for shear is 0.75, calculate the nominal shear strength.
If the strength reduction factor for moment is 0.9, calculate the nominal moment capacity.

Answer 7

4. 3 kN/m
5. 16 kN
6. 1 kNm
7. 88 kN
8. 44 kNm

Question 8

What is the factored loads to be carried by a 300 x 300 mm column if the tributary area is 3m x 3m. The dead load is
2 kPa, while the live load is 1.9 kPa.

Answer 8

25.2 kN

Question 9

A catwalk of an onion cold storage building is designed for a uniform dead load of 1.6 kPa and a uniform live load of 3.2
kPa.

Determine the dead loads carried by one of the hanger bars
Determine the live loads carried by one of the hanger bars
Determine the load combination of one of the hanger bars

Answer 9

2. 6 kN
3. 2 kN
4. 4 kN

Question 10

Determine the factored uniform dead load for a reinforced concrete beam if the length is 5m, and the beam cross
section is 0.2 x 0.3 m. Use unit weight of reinforced concrete is 24 kN/m3

Answer 10

1.44 kN/m

Question 11

A column in an agricultural structure is subjected to gravitational loads only. Using the tributary area concept what is
the required axial strength of the column of D = 400kN, L =530kN and Lr = 90kN.

If the dead load is significant such that the live load and roof live load is negligible, what would be the required axial
strength? If only dead and live load is significant, what would be the required axial strength of the column?

Answer 11

1373 kN
560 kN
1328 kN

Question 12

The base slab of a slaughter house building exposed on ground is made of 150mm thick reinforced concrete slab and
having 10mm reinforcing bars. What is the minimum concrete cover?

Answer 12

20mm

Question 13

A slab having a dimension of 5m x 3m x 0.125mm thick is a ______.

Answer 13

Two-way slab

Question 14

A column 300mm x 300mm is reinforced with 6-16mm reinforcement bars. The compressive strength of concrete is
27 MPa. Yield strength of rebars is 275 MPa. What is the nominal capacity of the column? What would be the design capacity of the column? What is the steel ratio of the section?

Answer 14

1895. 64 kN
1896. 17 kN
1897. 0134

Question 15

A column in an agricultural structure has the following dimensions: 0.3m x 0.3m, and 6-16mm longitudinal bars using
10mm ties. Determine the maximum vertical spacing of the tie.

Answer 15

256 mm

Question 16

If the column used in a poultry dressing plant is a 400 x 400 mm and having 8-16mm reinforcing bars, what is the
recommended concrete cover for the portion of the column not exposed to earth?

Answer 16

40mm

Question 17

What is the purpose of a lateral ties in a reinforced concrete column?

Answer 17

To increase column strength
To prevent buckling of longitudinal bars
To hold the longitudinal bars during construction

Question 18

It is a category of a reinforced concrete column where the height of an upright compression member is less than three
times its least lateral dimensions.

Answer 18

Pedestals

Question 19

The maximum clear spacing (cross sectional) between longitudinal bars for a reinforced concrete column is ______.

Answer 19

150 mm

Question 20

Which of the following is a function of a footing

Answer 20

To transfer the load to the underlying soil
To provide sufficient resistance to sliding and overturning
To prevent excessive or uneven settlements and rotations

Question 21

It is a report that determines the allowable soil pressures and other data regarding the soil where the structure is to be
built.

Answer 21

Geotechnical report

Question 22

What is the recommended concrete cover for the footing?

Answer 22

75 mm

Question 23

What type of footing is to be used when the columns are so close together that a single column footings would run to
each other?

Answer 23

Combined footings

Question 24

What type of footings is to be used when supporting the load of a single column only?

Answer 24

Isolated footings

Question 25

It is an iron-carbon alloy where the carbon content is greater than 1.7% by weight?

Answer 25

Cast iron

Question 26

It is an iron-carbon alloy where the carbon content is less than 0.15% by weight?

Answer 26

Wrought iron

Question 27

It is an iron-carbon alloy where the carbon content is between 0.15% to 1.7% by weight?

Answer 27

Steel

Question 28

Increasing the carbon content by weight of a steel influences its __________.

Answer 28

Strength and ductility

Question 29

More carbon content in a steel composition means __________?

Answer 29

More brittle but stronger

Question 30

The organization providing codes/standards for steel building construction

Answer 30

American Institute of Steel Construction

Question 31

It is the term for the steel as received from the steel producer or warehouse before being cold worked as a result of
fabricating operations

Answer 31

Virgin Steel

Question 32

What is the meaning of ASTM?

Answer 32

American Society of Testing Materials

Question 33

What is the meaning of AISC?

Answer 33

American Institute of Steel Construction

Question 34

A hot rolled steel shape has the following designation W14x22. What does the first letter indicate?

Answer 34

The shape is a wide flange

Question 35

What does the first two digit number correspond to?

Answer 35

The approximate value of the depth of the shape

Question 36

What does the second two digit number correspond to?

Answer 36

The weight of the shape

Question 37

Which of the following is not a built-up shape?
Double angles
Unequal leg angles
Plate girders 
Box shapes from channels or plates

Answer 37

Unequal leg angles

Question 38

The bolt hole diameter is __________ than the bolt diameter.