9512 HOLLY DR 2023-06-22 - Laserfiche WebLink

• • Structural: 17. The proposed project includes structural work. Structural drawing should be submitted that include framing plans, sections, details, construction schedules, fastening schedules, materials requirements, general notes, special inspection requirements, etc. The drawings should substantiate compliance with the prescriptive requirements of the IRC. See IRC Sections R106.1.1 and R301.1. 18. The modified load paths should comply with the prescriptive limitations of the IRC. Alternatively, an engineered analysis and design may be performed per IRC Section R301.1.3; sealed and signed drawings and calculations prepared by a professional engineer licensed in the state of Washington are required per RCW 18.43.010, 18.43.020, and 18.43.070. See IRC Section R301.1. 19. The project appears intended to include prefabricated roof trusses. See IRC Section R802.10. The following comments should be addressed: a. The design criteria for the trusses should be specified in the drawings. See Table R301.2(1) and EMC Section 16.01.010(J). b. The drawings should include a note specifying the following: i. The trusses should be designed by a professional engineer licensed in the state of Washington. ii. The truss construction drawings and calculations should bear the seal and signature of the engineer performing the design. iii. The truss design should be reviewed for conformance with the approved construction drawings and the referenced building codes, and approved for construction by the designer-of-record for the approved drawings, prior to fabrication and erection. c. The exterior walls will require stability bracing where the wall framing is not continuous from the foundation to the roof sheathing (i.e., the exterior walls are topped with end trusses). Details and calculations for the bracing should be submitted for review. Note that the bracing is not designed by the truss manufacturer, nor is the truss stability bracing intended to address this requirement. 20. Foundations should comply with IRC Chapter 4. Wood-framed construction on foundations should comply with Section R317.1, including clearance per Item 5. 21. Headers should comply with IRC Section R602.7. King and jamb studs should be specified for each header per Section R602.7.5. 22. Details for the construction of the new walls should be included. The details should specify connections for the top and bottom framing plates to the existing structure. See IRC Sections R106.1.1 and R301.1. 23. The building is required to have braced walls complying with IRC Section R602.10. The construction requirements of the braced walls, including anchorage to the foundations, should be included in the drawings. Note that connections to existing foundations using post-installed concrete anchors will require an engineered design. The locations of the braced walls should be specified in the plans. See IRC Section R106.1.3. 24. A general fastener schedule should be provided per IRC Table R602.3(1). Providing a reference to this table in the drawings does not satisfy this requirement. In addition,the make and model of proprietary hardware should be specified where used for connections. 3I4