2016-00571 - addition / remodel - Laserfiche WebLink

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�p Bunkers & Associates LLC a structura engineers 6687 Forest Street Farmington, MN 55024 651.366.2853 Date: May 12, 2016 To: Rehkamp Larson Architects, Inc. 2732 West 43�d St. Minneapolis, MN 55410 Attn: Amanda Kay From: Eric Bunkers Project: Markusen Residence 1135 Heritage Ln. Orono, MN 55391 Proj. No: 16134 Subject: Proposed Remodeling Dear Amanda: As requested, we designed new structural members for the above referenced project. We have designed the new members using a roof and floor dead load of 15 psf, a roof snow load of 35 psf, and a floor live load of 40 psf in accordance with the Minnesota State Building Code. Our work only includes designing the new members as shown at the above reference project and is based on drawings provided by you and from our conversations. Attached are S10—S12 structural sheets with annotated framing and foundation notes and details showing the new members and connections. All framing and foundations shall be shored and temporarily braced as required by the contractor and all minimum nailing shall be in accordance with IRC Table R602.3(1). Lumber shall be minimum #2 SPF with treated lumber to be#2 S. Pine and engineered lumber to have Fb =2600 psi with E =2.0. Our calculations assume all lumber is of good quality and does not have large splits and checks and shall be visually inspected by the contractor at the time of construction. All fasteners in contact with treated lumber shall be G185 hot dipped galvanized or equal. Rebar shall be grade 60. Steel plate shall meet ASTM A36 and steel tube shall meet ASTM A992. Concrete used for footings shall have a 28 day compressive strength of 5000 psi and masonry core grout shall have a 28 day compressive strength of 3000 psi. The new footings have been designed as a typical spread footing based on a presumptive load-bearing value of 2000 psf in accordance with Table R401.4.1 of the IRC. The existing footings have been assumed to be typical spread footings on good soils that are assumed to be pertorming adequately. The contractor shall also verify the condition of structural members and foundations affected by the remodeling. Exterior grade shall slope away from the building and gutters with long downspouts should be used whenever possible. Foundation backfill shall be granular and the foundation system is assumed to have drain tile. Our intention is to visit the project once framing is complete to get on overview of the framing and become generally familiar with the work. REC�I�/ED M��`f 2 3 2016 CITY OF ORONO