3. Are component and cladding design pressures consistent with ASCE 7 for the wind speed and exposure category (ASCE 7 Fig. 6-3)?

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Ralph Summers
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1 Mobile County Public Works Residential Plan Reviewers Checklist For Structural Requirements of Wood Framed Residences Recommendation: Permit as Noted Revise Plans and Resubmit MCPW Ref. No. Design Criteria: NA Yes No NI 1. Are floor and roof live loads appropriate (IBC Table )? 2. Is the design wind speed and exposure ( all directions) appropriate (ASCE 7 Fig. 6-1)? 3. Are component and cladding design pressures consistent with ASCE 7 for the wind speed and exposure category (ASCE 7 Fig. 6-3)? 4. If using prescriptive methods such as WFCM, is the building consistent with the limitations specified in the reference document? (building height, building dimension, max stud height, max floor and roof span, etc. [WFCM , WFCM Guides]) Foundation: NA Yes No NI (Note foundations are excluded from certain reference documents such as WFCM, so the reviewer should keep this in mind, particularly for elevated structures on piers. Such foundations may require an engineered design) 1. For walls resisting unbalanced fill soils, do the drawings clearly show the required reinforcement? 2. For walls resisting unbalanced fill, is the reinforcement consistent with that specified in the Building Code IRC Table R ? 3. Are foundations placed at least 12 below undisturbed ground (IRC R )? 4. Are hooked foundation dowels shown? 5. Are foundations provided beneath load-bearing elements? 6. Are reinforcing rods and perimeter ties installed with the required lap splices? Page 1 of 10

2 Floor, Ceiling, and Roof Framing: NA Yes No NI 1. Does the framing layout appear to address the gravity load path? 2. Are beams or girders provided underneath the primary load bearing elements? 3. Are joist and rafter spans consistent with the span tables (WFCM Tables 3.18b, 3.25a, 3.25b, 3.26)? 4. Where rafter spans are reduced with bracing, does the bracing fall over a bearing wall or properly designed beam? 5. Is full depth blocking called for in the first two floor joist spaces where the floor framing runs parallel to the exterior wall (WFCM Fig. 3.7b)? 6. For vaulted ceiling areas, is the ridge/ hip or valley member designed as a structural member? 7. If not, are ties provided to prevent displacement from the thrust created by the rafters from pushing the walls outward (WFCM Fig. 3.10c)? 8. Are ridge and valley beams clearly indicated and are details for anchorage shown? 9. Are structural outlookers provided where gable overhang exceeds 1-0 (WFCM )? 10. Is blocking shown between roof framings for the support of roof deck edges at roof penetrations and ridge vents (IRC R802.9)? 11. When ceiling joists are installed parallel to the sidewalls and ridge, are lateral ties called for at 4-0 on center (IRC R )? 12. Are offset bearing walls within the limits set by the WFCM Fig. 3.5c? 13. Are pack studs or posts provided under concentrated loads? 14. Are exterior columns such as those used to support the porch framing properly anchored to the foundation? Page 2 of 10

3 Exterior and Load-Bearing Walls: (Conventional wood framed) NA Yes No NI 1. Are the wall studs consistent with the height limits listed by the WFCM (WFCM Table 3.20a or A-3.20.a)? a. If not, are calculations provided? 2. Are special details or notes provided to account for framing around openings (WFCM )? 3. Do wall studs span between two identifiable diaphragms? Avoid framing walls to gypsum board diaphragms, such as at gable ends or raised rafter bearings. 4. Are horizontal diaphragm connections detailed such that a load path is defined? 5. For gable end walls, are studs platform framed? 6. If platform framed, then floor or ceiling diaphragms should be provided at the platform level. Are details provided to account for same? 7. Does the header schedule cover the range of openings shown on the plans (WFCM Table 3.22)? Wind Related Requirements: NA Yes No NI Shear: 1. Is wood structural panel shearwall fastening specified? 2. Is blocking called for at panel edges (WFCM )? 3. If other than wood structural panel sheathing, are structural calculations provided? 4. Are shearwalls identified on the plans? 5. Do shearwall segments conform to the maximum aspect ratio 3 ½:1 for wood structural panels (WFCM Fig.1.7)? 6. Do shearwalls extend continuously from the foundation to the roof (or floor) diaphragm? 7. Are hold down anchors provided at the ends of the shearwalls? 8. Are anchor bolts or other shear transfer methods employed at the base of the wall? Page 3 of 10

4 Uplift: NA Yes No NI 1. Is roof sheathing nailing schedule consistent with WFCM Table 3.10 or Table A-3.10? 2. Is blocking called for in the first two rafter spaces at gable ends? 2. Are wind collars or ridge straps called for at each set of opposing rafters (WFCM )? 3. Are positive uplift connections provided at the ends of roof framing members? 4. Is a continuous load path for uplift provided from the roof to the foundation? 5. For multi-story construction, are provisions shown for floor-to-floor load transfer for uplift? 6. Is uplift anchorage provided at the edge of all openings? 7. Where roof span exceeds 36 feet (WFCM limit) are interior supports provided with provisions for uplift resistance? Page 4 of 10

5 Miscellaneous Plywood used for Uplift Resistance: NA Yes No NI 1. Is exterior sheathing used to transmit both shear and uplift forces? a. If yes, does the sheathing extend from top to bottom of wall with all panels blocked? b. Are the fastening methods adequate for combined shear and uplift (SSTD 10 Table 305S1)? c. Are anchor bolts 5/8" diameter or larger spaced 18 o.c. maximum (SSTD )? d. Are 3 x3 steel plate washers specified? Foundation Anchorage: NA Yes No NI 1. Are anchor bolt size and spacing clearly identified? Does the spacing conform to WFCM Table 3.2a, b, and c? 2. Are anchor bolts specified within 12 of ends of each load bearing wall? 3. Are special anchors provided at the edge of openings? 4. When sill plate is used to transfer uplift to anchor bolts, are anchor bolts equipped with steel plate washers? 5. Is anchorage provided between piers and floor framing? NOTE: "NI"= Not Indicated "NA"= Not Applicable Rev. 2 Page 5 of 10

3.1 General Provisions

WOOD FRAME CONSTRUCTION MANUAL 107 3.1 General Provisions 3.1.1 Prescriptive Requirements The provisions of this Chapter establish a specific set of resistance requirements for buildings meeting the scope