HomeMy WebLinkAbout015- Narrative of Roof Area
Printed: 28 September 2023 4:09 PM Reports Page 1 of 1
2733 East Parleys Way, Suite 300 / Salt Lake City, Utah 84109-1662
Report REP #01
ISSUE DATE: September 29, 2023 REVISION #:
QUESTION
DEADLINE:
SUBMIT
QUESTIONS TO:
M: 385.299.6262
E: l_miller@woodburycorp.com
RESPONSE TO: Request for new roof and impervious surface area
PROJECT: Al’s Sporting Goods
Bozeman, Montana
OWNER’S
PROJECT #:
9521
OWNER: Woodbury Corporation
2133 East Parleys Way, Suite 300
Salt Lake City, Utah, 84109
CONTRACTOR: TBD
TBD
TBD
REPORT BY:
P: 801-485-7770
E:
ATTACHED: Roof area plan
Roof Area: The roof area will increase by 4,936 SF (which is unchanged from the added footprint). This calculation was taken to
the inside of the parapet wall.
Imprevious Surface Area: There is a new area of 468 SF of asphalt being proposed at the rear of the building. Please reference
C100 & C200 for location of added impervious surface area.
Drainage calculations - Q= CiA Because i is the same for all the calculations, I’m using Q/i = CA for the comparison.
C pavement = 0.95, C roof = 0.85, C landscaping = 0.2
The roof area is currently asphalt or concrete pavement C*A =4936*0.95=4689.2
The new pavement area is currently landscaping C*A = 468*0.2= 93.6
The existing C*A= 4782.8
The new roof C*A = 4936*0.85= 4195.6
The new pavement C*A = 468*0.95=444.6
The new total C*A = 4640.2
These calculations show that the new configuration will decrease the rate at which water leaves the site. This should improve the
storm drainage for the city master plan.
Comments From the Architectural Designer: Ref. #18 states, “DSSP II - Provide a memo showing the change in roof size and
impervious area and show if the increase fits within the mater storm water plan.” However, no Master Plan has been provided. Please
advise.
END OF REPORT #01
XXX, XXX 9/29/23
Realtors / Brokers / Managers
Developers / Consultants / Architects
(801) 485-7770
Fax (801) 485-0209