Response to BLDG Comments 1 BLDG A.pdfR E S U B
JUN 0 7 2018
al)ILDINGDEPARTWCOmment Response
Date: June 6, 2018
To: Chuck Miller, Senior Plans Examiner, City of Edmonds
From: Thaddeus Egging, KPFF and Joseph Mangan, Pacific Mobile Project Engineer
Subject: Sherwood Elementary School Portable Classroom "B" (Permit # BLD2018-0471)
Comment Responses
The following comment responses are in response to Building Plan Review comments dated
May 11, 2018 prepared by Chuck Miller (attached for reference):
1. COMMENT: On Sheet G0.0-Cover Sheet: Site Plan -Locate on the plans between
`Building Unit C' and the relocatable classroom the `imaginary line' to be used to
determine the exterior wall and opening protection set forth in International Building
Code (IBC) Sections 705.5 and 705.8 per IBC 705.3.
RESPONSE: Refer to revised Sheet G1.0 (attached) for fire separation imaginary line
(assumed property line) between Building Unit C and relocatable classroom B. The fire
separation/assumed property line is drawn 10 feet from existing Building Unit C based
on the following IBC requirements:
IBC 705.3 specifies "Where a new building is to be erected on the same lot as an
existing building, the location of the assumed imaginary line with relation to the existing
building wall shall be such that the exterior wall and opening protection of the existing
building meet the criteria a set forth in Section 705.5 and 705.8."
IBC 705.5 requires the fire resistance rating of the exterior walls to be rated for exposure
to fire from the inside if the fire separation distance is greater than 10 feet or rated for
exposure to fire from both side if the fire separation distance is less than or equal to 10
feet. Conservative assumption that the existing Building Unit C exterior wall is rated for
fire exposure from the inside requires the fire separation distance to be greater than 10
feet.
IBC 705.8 allows a maximum area of exterior wall opening of 15% for an unprotected,
nonsprinklered building with fire separation distance of 10 to less than 15 feet. Building
C exterior wall opening is approximated at 14.95%, conforming to the maximum wall
opening area for the given fire separation distance.
2. COMMENT: On Sheet A20.1-Pacific Mobile Foundation Designs: Clarify on the plans
the difference in the represented construction/connections and of that specified in the
provided structural calculations. Of particular concern are the lateral design elements
noted in Division 'II'— Foundation Design — Section 'E' — Lateral Design — of the
calculations that to not appear on the plans.
RESPONSE: Differences between the submitted calculations page and foundation
drawing (A20.1) have been resolved. See revised A20.1 and structural calculations
(attached). Specific resolutions are highlighted and explanations given in clouds. Note A
highlights 7/16" sheathing prescribed by the calculations page while thicker'/z" sheathing
is described in the drawing. The note also points to the calculations having 16" o.c.
fastener spacing while the plans show 12" o.c. The thicker sheathing and closer
fastener spacing should provide more strength and not be a problem. Note B highlights
5/8" diameter anchor bolts on both the calculations and drawings page. The drawing
Citv of Edmonds
PLAN REVIEW COMMENTS
BUILDING DIVISION
(425) 771-0220
DATE: May 11, 2018
TO: Will Thomsen
thomsenW((L,)edmonds.wednet.cdu
FROM: Chuck Miller, Senior Plans Examiner
chuck.millcr((t?cdmondswa.gov
RE: Plan Check: BLD2018-0471 - I" review
Project Address: 22901 106th Avenue W
Project: ESD Sherwood Elementary relocatable classroom `B'
Scope: Siting, connection, support, and lateral restraint of manufactured classroom
structure — nonseparated Education Group E occupancy — 42 occupants — VB
construction — no sprinkler system — fire alarm under separate permit
Please be advised that the building plans for the above referenced project have been disapproved
for the purposes of obtaining a building permit. During a review of the plans by the Building
Division for compliance with the applicable building codes, it was found that the following
information, clarifications, or changes are needed. Reviews by other divisions, such as Planning,
Engineering, or Fire, may result in additional comments that require attention beyond the scope of
this letter.
A complete review cannot be performed until the revised plans/documents, including a
written response in itemized letter format indicating where the `clouded' or otherwise
highlighted changes can be found on the revised plans, have been submitted to a Permit
Coordinator. Only those sheets specifically referenced as follows need to be resubmitted.
Resubmittals must be made at the Development Services Department on the 2nd Floor of City Hall.
Permit Center hours are M, T, Th, & F from 8am-4:30pm and from 8:30am-12pm on Wednesdays.
On sheet G0.0 — Cover Sheet:
1. Site Plan — Locate on the plans between `Building Unit C' and the relocatable classroom the
`imaginary line' to be used to determine the exterior wall and opening protection set forth in
International Building Code (IBC) Sections 705.5 and 705.8 per IBC 705.3.