Construction of houses using wood wall panels - cost estimating and construction processes.

1. Housing Construction Using Panel Walls (wood) For A Single-
Family House
Prepared by group 2 members:
Sherif Hafez Seyedfarid Mirahadi Hassan Kahil Nagham Matout

2. Contents
 Project Description
 Structural Insulated Panels
 Construction Processes
 Productivity
 Cost
BLDG 6831/492 - Winter 2012 - Group 2

3. Project Description
 The house is a single family home with a total built up area of 1705 sq. ft.
divided on three floors including the basement floor.
BLDG 6831/492 - Winter 2012 - Group
2

4. Structural Insulated Panels
 Composition
SIP panels are made up of different layers, most commonly OSB panels (engineering
wood product formed by layering strands of wood in specific orientations) surrounding a
foam core of expanded polystyrene (EPS), extruded polystyrene (XPS) or rigid
polyurethane.
 Advantages
• High quality
• Energy Efficiency
• Easy to construct
• Lower operating and maintenance
costs
• Cost and Time Efficiency
BLDG 6831/492 - Winter 2012 - Group
2

5. Construction Processes
• Site Preparation
• Foundation
• Floor Framing
• Subfloor
• Wall Panels
Installation
• Roof Frames
BLDG 6831/492 - Winter 2012 - Group
2

6. Cost
• Labor salary
• Material • Hand Tools
• Pick-up Truck
• Equipment and Tools
a. Ownership Costs:
1. Depreciation Cost
2. Interest on borrowed money
3. Registration and taxes
4. Insurance
b. Operating Costs BLDG 6831/492 - Winter 2012 - Group
2

7. Labor Cost – CCQ Regulations
 CCQ – Commision de construction du
Quebec.
 Carpenter Joiner – Trade 160
 CCQ levels of labor competency – Apprentice
and Journeyman
 Journeyman – Apprentice ratio in residential
sector is 1:1
BLDG 6831/492 - Winter 2012 - Group
2

8. Labor Cost – CCQ Salary Break-
Down
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15)
Fond
Salar Salari Employme Regim Social CCQ AECQ Safet Other
Vacatio RQA F.S. Insuran s
y e nt e de Benefi Contributi Contributi y Contributio Total
ns P S ce Tax Dever
Rate Brut Inssurance rentes ts on on Gear ns
s
Carpenter 30.5 34.4 0.9
3.97 0.71 0.27 1.74 5.76 0.18 0.26 0.03 0.22 0.60 0.04 45.26
Joiner 1 8 8
Apprentice 18.3 0.6
2.38 20.69 0.43 0.16 1.05 5.02 0.18 0.60 0.03 0.22 0.60 0.04 29.18
Period 1 1 1
Apprentice 21.3 0.7
2.78 24.14 0.50 0.19 1.22 5.02 0.18 0.18 0.03 0.22 0.60 0.04 33.01
Period 2 6 0
Apprentice 25.9 0.8
3.37 29.30 0.60 0.23 1.48 5.02 0.18 0.22 0.03 0.22 0.60 0.04 38.75
Period 3 3 4
BLDG 6831/492 - Winter 2012 - Group
2

9. Labor Cost – Hourly Cost
Production Rate
No. Worker Cost/ hour Cost/sq.ft
sq.ft/hour
1 Journeyman 1 45.26 100 -
2 Journeyman2 45.26 100 -
3 Apprentice 1 29.18 100 -
4 Apprentice 2 29.18 100 -
Total 148.88 400 0.4
BLDG 6831/492 - Winter 2012 - Group
2

10. 1. Depreciation Cost – Pickup
Truck
 The cost of our selected pickup truck is
$50,128 as For service life of 4 years.
BLDG 6831/492 - Winter 2012 - Group
2

11. 1. Depreciation Cost – Pickup
TRuck
 CCA – Capital Cost Allowance method by
CRA – Canada Revenue Agency.
BLDG 6831/492 - Winter 2012 - Group
2

12. 1. Depreciation Cost - Pickup
Truck
 CCA Rate.
BLDG 6831/492 - Winter 2012 - Group 2

13. 1. Depreciation Cost – Pickup
Truck
 Schedule 8. CCA by CRA
BLDG 6831/492 - Winter 2012 - Group
2

14. 1. Depreciation Cost – Pickup
Truck
 Depreciation Curve.
Book Value
60,000.00
50,000.00 Cost Basis
40,000.00
Book Value
Salvage Value
30,000.00
20,000.00
10,000.00
-
0 1 2 3 4
Book Value 50,128.00 42,608.80 29,826.16 20,878.31 14,614.82
Depreciation Life in Years
Book Value
BLDG 6831/492 - Winter 2012 - Group
2

15. 2. Loan interest Cost – Pickup
Truck
 Amortization Tabular Method.
 Total interest rate for the first year =
$2,464.97 / 2000 = $1.25/hr
BLDG 6831/492 - Winter 2012 - Group
2

16. 3. Registration and Taxes
 SAAQ tables.
 $710.15/2000 = $0.36/hr
BLDG 6831/492 - Winter 2012 - Group
2

17. 4. Insurance Cost
 Price quote from TD Auto insurance:
$2,508/year/2000= $1.3/hr
BLDG 6831/492 - Winter 2012 - Group
2

18. Total Ownership Costs
Cost Component Cost/hour
Depreciation $3.75
Interest Cost $1.25
Registration and Taxes $0.36
Insurance $1.3
Total/hour $6.7/hr
BLDG 6831/492 - Winter 2012 - Group
2

19. Total Ownership Cost
Cost/hour
Insurance
Registration 20%
and Taxes
5%
Depreciation
Interest
56%
Cost
19%
BLDG 6831/492 - Winter 2012 - Group
2

20. b. Operating Cost
Annual Hourly
No. Category
Cost Cost
1 Periodic Maintenance 650.00 0.33
2 Oil change 650.00 0.33
Fuel/Diesel
3 13,000.00 6.50
consumption
4 Tires 119.00 0.06
Total 14,419.00 7.21
BLDG 6831/492 - Winter 2012 - Group 2

21. Tools Cost
Description Cost Service Life Time Cost/Hour
Set of hand tools for one
9,937.00 4000
crew 2.48
BLDG 6831/492 - Winter 2012 - Group
2

22. Total Cost Illustration
Annual Hourly Cost/sq.f
Category
Cost Cost t
Labor Cost 297,760.00 148.88 0.37
Equipment cost 32,760.00 16.38 0.04
Tools 4,960.00 2.48 0.01
Total 330,520.00 165.26 0.41
BLDG 6831/492 - Winter 2012 - Group
2

23. Total Cost Illustration
Equipme Hourly Cost Tools
nt cost 1%
10%
Labor
Cost
89%
Total Hourly Cost Categories
Proportions
BLDG 6831/492 - Winter 2012 - Group
2

24. Conclusion
Productivity Total Total
Total Square Footage Cost/sq.ft
sq.ft/hr Hours Cost
1962 400 165.22 5 827
BLDG 6831/492 - Winter 2012 -
Group 2

25. Questions