31B-296 3 Tyler Court - Reading Room3 Tyler Court, Northampton, MA
Re: Reading room - description The reading room is a remodeled space from existing, stacked 1st & 2nd floor 3 season porches. The brick foundation/knee wall and roof structure will be reused. The footprint will remain the same – 14’ x 11’- 6”. Two sides of the room are fully exposed – West (14’) and South (11’- 6”) with one side partially exposed - North (5’– 6”). The remaining portion of the North wall is the existing 2 story wood frame house. This portion has clapboard siding. The East wall is the existing wood frame house with brick veneer.
The proposed remodel removes the second floor. The South wall and West wall will have 6 individual windows in
each (not mulled) – 3 over 3.
The intent was to frame the walls of 2”x 4” with triple studs between each window and ½” MDO plywood acting
as the siding and sheathing (a.k.a. wood structural panel)
My review of the code identified some language that I would like to reference in my search for a code compliant
prescriptive structural design. I am referencing chapter sections from the 2012 IRC.
Assumptions:
Seismic design category, B – R301.2(2), Page 33 Basic Wind speeds, 100 mph - R301.2(4)A, Page 35 Ground Snow Load, 40 Lb/sf - R301.2(5), Page 39
Specific to braced wall panels:
Story height, 10’ (or 12’) - R301.3 Page 46 & 602.10.3(1), Page 167
Max allowable length of wood stud wall (100 mph) 16’ if 2”x 6”, 24” on center – R602.3.1, Page 156
Braced wall panels - R602.10.2.3 Minimum number of braced wall panels, Page 166
Bracing Methods - Table R602.10.4 Bracing Methods and R602.10.4.1 Mixing Methods, Page 175
Portal Frame - R602.10.6.4 Method CS-PF (continuously sheathed portal frame), Page 179
Tension strap capacity - R602.10.6.4, Page 181
Ends of braced wall lines - R602.10.7 & R602.10.8 Page 183, Figure R602.10.7