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ACX ENGINEERING <br /> STRUCTURAL CALCULATION p / <br /> Project: UB-Everett lJob No. 2016-SS-014 Calc. No. Rev.: 0 <br /> Subject: Roof Hatch Replacement Discipline: Structural <br /> Design Criteria <br /> Description of Project: <br /> New roof hatch w/ pre-fabricated guardrail & stair <br /> Scope of Design: <br /> • Roof hatch support and opening framing design <br /> Design Code: <br /> 2012 IBC <br /> Design Reference: <br /> 1. Design Specification and Manual <br /> • Wood Structure 2012 NDS <br /> • Anchorage Screws 2012 NDS <br /> Design Materials: <br /> • Wood Framing DLF, Graded Lumber <br /> • Lag Screws 2012 NDS <br /> Existing Structures <br /> • (E) TJL Open Web Joist ICC-ES Legacy Report, PFC-4354 <br /> • (E) Glu Lam Beam 24F-V4 <br /> Design Loads: <br /> Roof Hatch wl stair <br /> DL 300 Ib, max. <br /> LL 300 Ib <br /> Existing Roof Dead Load 12 psf <br /> Existing Roof Live Load 20 psf <br /> Existing Roof Snow Load 25 psf <br /> 1520 Brookhollow Dr., Suite#45, Santa Ana, CA 92705 Tel: (714)662-051 <br /> Fax: (714)662-055 <br />