7822 BEVERLY LN B 2025-04-11 - Laserfiche WebLink

Engineer's Inspection of the Property at 7822-B Beverly Lane, Everett, Washington EVALUATIONS You are in the process of constructing a deck on the back side of your house. The deck measures about l4feet by 20 feet. It is further planned to install a roof over the deck. The overall construction appears to be good. However, I have the following comments. The deck is supported on 16 inch diameter concrete footings. With roof load and deck loading, the size of the footings is marginal. I recommend that the outboard ends of the deck be supported by 30 inch square footings, founded no less than 18 inches below the grade of the yard. I noted that the 6x6 deck support posts are founded on the existing footings and post brackets but they will be wet during some times of the year. This will result in decay. The posts should be perched up about 6 inches above the finish grade of the yard. Structurally,the 6x6 posts are adequate. The 6x6 posts support a 4x12 beam on one side of the deck and a double 2x10 on the other side. The 4x12 is adequate but the double 2x10 is not adequate. The joist hanger connection is also not adequate. I recommend that you install a pressure treated 4x12 below the portion of the deck supported by the double 2x10. The new post should be supported to the earth with pressure treated posts and 30x30 concrete footings, It is planned to form the deck with 2x10 floor joists on 16 inch centers and a Cedar 5/4 wear surface. They will be supported by the 4x12 beams on the outboard end and with a header and joist hangers on the inboard end. The header is in place, secured with'A inch lag bolts into the rim joist of the house. Theoretically,the lags are adequate but an additional lag between each joist bay is recommended for safety. Overall,this is a structurally adequate design with enhancements. You plan to construct a roof over the deck with a composition shingle roof covering. I recommend that the roof be supported at the eaves and at the ridge with 4x12 beams, and 4x6 pressure treated posts. The beams can be supported in the house wall with the proper blocking and at the outboard ends with 4x6 pressure treated posts and proper Simpson connections. The rafter system is planned as 2x8s on 24 inch centers with plywood sheathing. The pitch will match the house pitch(about 4:12). This is an adequate structure. You have constructed a few landings for stairs leading to the deck. They are structurally adequate as constructed. As we discussed, you plan to cut an access door in the end of the house in the vicinity of an existing window. Theoretically,this is not a structural wall. No problems are anticipated as long as the new door opening is in the same area as the existing window. Page 2 of 15