Design of Wood Structures – BCT 540 University of Massachusetts, Amherst

Department of Environmental Conservation Building and Construction Technology Program

Term Project #2 – Creation of a Framing Plan for a Standard Residence Value: 20% of course grade

Description Your task is to use WoodWorks Sizer to design the first and second floor joists and beams, roof rafters and wall studs of a standard colonial home.

Instructions Document this project as though you would be handing it over to your employer or client. Your calculations and assumptions should be clearly shown.

Show your working/calculations CLEARLY on pages separate from this document. Itemize material weights tocalculate dead loads and explain how line loads are calculated. If you make judgments and assumptions,explain them clearly.

Assume all floor and ceiling joists, roof rafters and wall studs at 24 inches on-center.

Break down loads into live, snow and dead load components throughout.

Use the products partially specified in the attached summary sheets.

PROVIDE THE “DESIGN CHECK CALCULATION SHEET” FOR EACH MEMBER YOU DESIGN.

o LABEL SHEETS CLEARLY to correspond to members on the plan by saving them with logicalnames. For example, save the file for ceiling joist J1.3 as ceiling_J1_3.wwb. The project name will beshown in the right hand corner of the sheet.

o LABEL loads on sheets to clearly show from where they came.For example, separate and label roof DL and wall DL on wall.2.

Complete the Summary Sheets (contained in the file on the website) and hand them in with your project.

Load Conditions

Use the materials as shown on the drawings and Appendix B in your text (Breyer et. al. – Design of WoodStructures) to estimate floor, roof and wall dead loads. Round up the dead load to the nearest multiple of 5psf.

Determine appropriate floor and attic live loads in chapter 4 of SEI/ASCE 7-02 “Minimum Design Loads forBuildings and Other Structures” found for free on the internet.

The design snow load for the region where the house will be built is 35psf, projected.

Wind and seismic loads can be ignored.

Grading

Your mark will be based on the following grading rubric:

Printouts included for all 16 members (max. 30%) Mastery of course concepts (max. 30%) Accuracy (max. 30%) Clear labels and organized (max. 10%)

Information Summary Sheet (page 1/2) 1st Story Floor level

Floor Dead Load (psf) = _________________

Floor Live Load (psf) = _________________

Member Total length Size/Grade/Species

J1.1 1 ¾ in x ________ in deep APA PRI-50 I joists

J2.1 2 x _______ in deep No. 2 or better SPF

J3.1 1 ¾ in x ________ in deep APA PRI-50 I joists

B1.1 14’ ____ plys 1 ¾ in x ________ deep 2.0E 2950 Fb LVL

B2.1 11’ ____ plys 2 x ________ deep No. 2 or better SPF

B3.1 8’6” ____ plys 1 ¾ in x ________ deep 2.0E 2950 Fb LVL

2nd Story Floor level

Floor Dead Load (psf) = ________________

Floor Live Load (psf) for sleeping area = _________________

Member Length Size/Grade/Species

J1.2 1 ¾ in x ________ in deep APA PRI-50 I joists

J2.2 1 ¾ in x ________ in deep APA PRI-50 I joists

B1.2 9’ 6” 2 11/16 in x ________ deep 2.0E PSL

B2.2 7’ 4” ____ plys 2 x ________ deep No. 2 or better SPF

STUDENT NAME: __________________________________

STUDENT ID: ______________________________________

Information Summary Sheet (page 2/2)

Walls

Wall Dead Load (psf) = ________________

Member Height Size/Grade/Species

Wall.1 2 x _______ in deep stud grade SPF

Wall.2 2 x _______ in deep stud grade SPF

2nd Story Ceiling level

Ceiling Dead Load (psf) = ________________

Ceiling Live Load (psf) for uninhabitable attic with storage = ________________

Member Length Size/Grade/Species

J1.3 2 x _______ in deep No. 2 or better SPF

B1.3 6’ 8” ____ plys 1 ¾ in x ________ deep 1.8E 2200 Fb LVL

B2.3 6’ 8” ____ plys 2 x ________ deep No. 2 or better SPF

Roof

Roof Dead Load (psf) = ________________

Snow Load (psf) = _________________

Construction Load (psf) = _________________

Roof joist 2 in x ____________in deep No. 2 or better SPF

B1.1J1.1

J2.1

B2.1

B3.1J3.1

Wall.1

J1.2

B1.2

B2.2

J2.2

J2.3

B2.3

Wall.2B1.3

J1.3

Roof Rafters

2nd story floor joists (Jx.2)

1st story floor joists (Jx.1)

2nd story ceiling joists (Jx.3)

2nd story wall studs (Wall.2)

1st story wall studs (Wall.1)

3 ½