1010 93RD ST SW 2024-12-30 - Laserfiche WebLink

PURPOSE Table 1: ELIGIBILITY FOR USE APPLICANT The purpose of this Plan Set is to promote public safety and welfare by reducing earthquake- INFORMATION induced damage to existing wood-frame cripple wall dwellings. The prescriptive designs E ure 1 Compliant Non- provided in this Plan Set is being published based on FEMA P-1100,Volume 2. To determine if a home qualifies;answer the following: p com liant The provisions of this Plan Set address a single vulnerability;see the FEMA P-1100 Prestandard for assessment and retrofit methodologies. Use of this Plan Set is intended improve earthquake 1. The dwelling u it one-or two-family detached structure et townhouse. g p q Bottom of Floor ® The dwelling unit is a townhouse and assessment and retrofit will occur for all attached townhouse ® ❑ performance but is not intended to prevent earthquake damage.For additional information,see Framing ® ® ® ® dwelling units at the same time. https://www.fema.gov/media-library/assets/documents/175158 7-0"maximum 2.The dwelling is a wood light-frame dwelling that is two stories or less basement OK. SCOPE \�� 9 9 9 ( ) ® ❑ This Plan Set contains prescriptive provisions for retrofit of wood light-frame crawlspace/basement To of Foundation Foundation dwelling anchorage to the foundation and cripple walls. Dwellings shall be considered cripple p 3.The dwelling is a crawlspace/basement and the perimeter(not inducting porches or other wall dwellings for purposes of this plan set when: appurtenances)is supported on: The dwelling has unoccupied space or basement below the lowest framed floor. a.Cripple walls,or ® ❑ The dwelling has cripple walls not exceeding T-0"tall (Figure 1). Fi ure 2 L=Length of Downslope b.Foundation stem walls,or The downhill slope does not exceed 30%.(Figures 2&3). c. Post and pier systems to be retrofitted with cripple walls,or 7/(Slope)=L d.Cripple walls or foundation stem walls in combination with a slab on grade foundation. L o ELIGIBILITY Example.?/3=23'-4" v a Cripple wall dwellings are permitted to use the prescriptive retrofit provisions of this Plan Set 23'-4"max length at 309,0,slope Living Space 4.The dwelling has a continuous perimeter foundation(not including porches or other appurtenances), ® ❑ _0 E N concrete stem walls,or will be retrofitted to have a continuous perimeter foundation. c Q v when all questions in Table 1 can be answered with"compliant". For dwellings not eligible to co , zp use this Plan Set,see the FEMA P-1100 Prestandard,Section 4.5 for the Simplified T-0" `—' v v — Engineered Procedure or consult a Registered Design Professional. maximum 5.Cripple walls,where they occur,do not exceed T-0"in clear height. ® ❑ Q o - W Crawl Space/Basement Q a rz DIFFERING CON DITIONS 6.The maximum slope as measured from the top of foundations along one edge of the home to the other ® ❑ Where a dwelling's actual conditions require modification of the vulnerability-based 30%Slope maximum end does not exceed 30%. prescriptive retrofit solutions identified within this plan set,additional or modified details may 7.Weight of roofing material shall not exceed 12 psf.,except for one-story crawlspace dwellings with be generated by a Registered Design Professional and used to supplement the prescriptive ❑ clay file roofing as described in footnote 1 below. procedures of this section.These supplemental details shall be stamped and signed by a Registered Design Professional and approved by the Building Official. 0 Figure 3 Uphill Cripple 8. Weight of exterior wall finish shall not exceed 10 psf.(Stucco OK),except that masonry wainscots supportea l .2 DESIGN BASIS Wall Height on concrete or masonry foundations are permitted to extend up to four feet above the top of foundation. ® ❑ o This Plan Set is based on Chapter 4 of FEMA P-1100 Prestandard.Specific Cripple Wall at ® 0'-0"minimum Brick veneer ok for one story condition per note on sheet S3 a design assumptions are as follows:R=4.0; (L=1.5;S os=1-0,Site Class D. Downhill Side 7'-0"maximum ® 9- The maximum square footage of the dwelling,excluding areas supported on slabs on grade,do not ® El exceed 3,000 square feet for one story dwellings and 4,000 square feet for two-story dwellings. Downhill Cripple cn Wall Height 7'-0"maximum 10.No part of the foundations is constructed of unreinforced masonry or stone. ® ❑ E E N O (n 3 04 0 Stepped or loped 11. There is no indication that an engineered seismic force-resisting system is present in the dwelling ® ❑ ) 3 N p w Foundation (engineered plans,visible tie-down brackets). CO 0 ) Z L U E 7 Sloped Grade If you answered"Compliant"to each of these questions,proceed to Sheet S3 V — >If you answered"Non-compliant"to any of these questions the home is noteligible to apply this plan set,unless a Registered uEi Design Professional addresses the non-compliant issues in accordance with P-1100 FEMA Prestandard,Section 4.5,Differing O Q.(D o a) Conditions. U N En Footnote: GENERAL CNe Wall Retrofit in accordance with this plan set shall include each _ 1. One story crawlspace dwellings with clay tile that weigh up to 20 psf or full height brick veneer(with light roof material)shall M M O3 Floor Framing to O Wood Structural be permitted to be strengthened in accordance with the provisions for two-story heavy construction as noted in the U o of the following for the full extent of the crawlspace perimeter Cripple Wall Top Panels applicable Earthquake Retrofit Tables. "' " p 0 — (Figure 4): Plates Lee-Florentina Retrofit, 14- W O1 Wood structural panels in accordance with the Earthquake Retrofit 0 0. 1010 93rd St SW, Schedule,Sheet S3.1 and details on Sheets D5&D4 at all non- o +, zero height cripple walls,and p 0 C C Everett, WA 98204 p O O2 Foundation sill plate anchorage to the foundation in accordance Parcel #00534000003100 with the Earthquake Retrofit Schedule,Sheet S3.1 and details on Sheets D1&D2,and p O3 Floorframingto cripple wall top plates or floor taming tofoundation SHEET LIST Legal Description: O'CONNOR & sill plate connections in accordance with the Earthquake Retrofit S0 Cover Sheet CRONINS MIDLAND GDNS 4 BLK 000 Schedule,Sheet S3.1 and details on Sheets D3&D5. S1 General Notes D-00 - LOT 31 S2 Supplemental Technical Notes Any retrofit not incorporating each applicable item at the full crawlspace .� S3 Seismic Design Category,Weight Classification,and Connectors perimeter shall not be identified as conforming to this Plan Set, S3.1 Earthquake Retrofit Schedule All work shall be in accordance with Sheet S1 General Notes. S4 Foundation and Retrofit Layout Plan This Plan Set for strengthening is intended to be approved by the ''' D1 Foundation Sill to Concrete Foundation Connection Details D2 Floor Framing to Foundation Sill Connection Details Building Official without requiring additional plans or calculations,except r';' D3 Floor Framing to Cripple Wall Connection Details Revision Date. as required for differing conditions ' '` D3.1 Floor Framing to Cripple Wall Connection/Foundation Replacement Details O2 Foundation Sill Plate Anchorage D3.2 Floor Framing to Cripple Wall Connection Details Sheet ASSESSMENT to Foundation D4 Wood Structural Panel Installation without Tie-Downs The retrofit provisions of this Plan Set are intended to apply to dwellings D5 Wood Structural Panel Installation with Tie-Downs so that have been assessed based on the FEMA P-1100 Prestandard methodology Fi ure 4 D6 Vent Openings and Top Plate Details with local amendments and found to have a crawlspace dwelling vulnerability.