Student Name: __________________________________
Date___________________________________________
Objective: This lesson is designed to help you understand floor systems and their components.
Directions: Please answer the questions on this sheet of paper. Doing this will help you identify the most important parts of the lecture and class discussion concerning the installation of floor systems. The worksheet will be turned in, graded, and returned to you to help you study for your test.
1. What is a Mud Sill
2. How is a Mud Sill attached to the foundation?
3. State the maximum spacing for anchor bolts?
4. Describe a header.
5. Describe a common joist?
6. Describe two instances where a double joist would be installed.
7. Describe a rough opening.
8. Where can the locations of rough openings be found on a set of blueprints?
9. Describe a trimmer joist.
10. Describe a tail joist.
11. Explain what a joist hanger is and what it is used for.
12. State the dimensions of a piece of ¾” Tongue and Groove OSB.
13. State the reason for the tongue and groove.
14. State the advantage of using Top Notch OSB instead of regular OSB.
15. What is bridging or blocking?
16. According to Building Code what is the maximum spacing for runs of blocking or bridging?
17. What is the advantage of using Wood I joists?
18. Is it ok to cut the OSB board of a Wood I joist?
19. Is it ok to cut the top or bottom board of a Wood I joist?
20. Is it Ok to cut part of a Wooden Floor Joist?
Joist Selection
Directions: Use the attached joist selection sheets from the International Residential Building Code to complete the worksheet
Dead Load: 10psf, Live Load: 30psf
Choose the smallest framing Member size for the following problems.
- Span= 12’, Southern Pine #1, Joist Spacing: 12”
- Span= 14’, Spruce #2, Joist Spacing: 24”
- Span = 13’-8” Spruce #1, Joist Spacing: 16”
- Span = 15’-11”, Southern Pine #1, Joist Spacing 12”
- Span = 18’- 4”, Southern Pine #2, Joist Spacing 24”
Critical Question 10 points: If there is not a Joist size that will span the required area, what must be done?
Dead Load: 20 psf, Live Load: 30psf
Choose the smallest framing Member size for the following problems.
- Span= 13’-6”, Southern Pine #2, Joist Spacing: 12”
- Span= 14’-10”, Spruce #1, Joist Spacing: 16”
- Span = 8’-8” Spruce #1, Joist Spacing: 12”
- Span = 15’-2”, Southern Pine #3, Joist Spacing 12”
- Span = 17’- 4”, Southern Pine #2, Joist Spacing 12”
Dead Load: 10psf, Live Load: 40psf
Choose the smallest framing Member size for the following problems.
- Span= 12’, Southern Pine #1, Joist Spacing: 12”
- Span= 14’, Spruce #2, Joist Spacing: 24”
- Span = 13’-8” Spruce #1, Joist Spacing: 16”
- Span = 15’-11”, Southern Pine #1, Joist Spacing 12”
- Span = 18’- 4”, Southern Pine #2, Joist Spacing 24”
Critical Question 10 points: If there is not a Joist size that will span the required area, what must be done?
Dead Load: 20 psf, Live Load: 40psf
Choose the smallest framing Member size for the following problems.
- Span= 13’-6”, Southern Pine #2, Joist Spacing: 12”
- Span= 14’-10”, Spruce #1, Joist Spacing: 16”
- Span = 8’-8” Spruce #1, Joist Spacing: 12”
- Span = 15’-2”, Southern Pine #3, Joist Spacing 12”
- Span = 17’- 4”, Southern Pine #2, Joist Spacing 12”
41. Estimating
Mud Sill ________lf
Beam Material ________lf
Joists ________ea.
Headers ________lf
Bridging ________lf
Sub Floor ________sf
42. Estimating
Mud Sill ________lf
Beam Material ________lf
Joists ________ea.
Headers ________lf
Bridging ________lf
Sub Floor ________sf
43. Estimating
Mud Sill ________lf
Beam Material ________lf
Joists ________ea.
Headers ________lf
Bridging ________lf
Sub Floor ________sf
44. Estimating
Mud Sill ________lf
Beam Material ________lf
Joists ________ea.
Headers ________lf
Bridging ________lf
Sub Floor ________sf
45. Estimating
Mud Sill ________lf
Beam Material ________lf
Joists ________ea.
Headers ________lf
Bridging ________lf
Sub Floor ________sf
46. Estimating
Mud Sill ________lf
Beam Material ________lf
Joists ________ea.
Headers ________lf
Bridging ________lf
Sub Floor ________sf
47. Estimating
Mud Sill ________lf
Beam Material ________lf
Joists ________ea.
Headers ________lf
Bridging ________lf
Sub Floor ________sf
48. Estimating
Mud Sill ________lf
Beam Material ________lf
Joists ________ea.
Headers ________lf
Bridging ________lf
Sub Floor ________sf
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