10115 HOLLY DR BLDG C OLIN FIELDS APTS 2023-12-07

Olin Fields Apartments—Damaged Deck Framing Review November 9,2022 DIBBLE ENGINEERS INC ITEM#2:BUILDING C—DAMAGED FLOOR FRAMING AT VENTS At the northwest elevation of Building C,DEI reviewed the framing conditions under the bellyband around the vent openings.At this location,the 2x10 rim and blocking is severely damaged and crumbling off.The ends of the floor joists and the floor sheathing are damaged between 12 to 20 inches back into the building.The double top plate below the rim and the bottom plate above the rim are damaged as well. DEI recommends that the Contractor removes the siding above and below the damaged rim,chasing the damaged framing until competent framing material is uncovered.Please reference the General Wood Remediation Guidelines on sheet S1.0 for more information on evaluating the structural competence of the existing wood framing.Contact DEI with any questions about the extent of the framing damages. Where the floor sheathing is damaged 16 inches or less, DEI recommends removing the damaged sheathing material,treating the remaining sheathing per the notes on sheet S1.0,and retrofitting the floor sheathing and connections per SK-4. If the floor sheathing is damaged more than 16 inches, DEI recommends removing and replacing the sheathing in four foot minimum square sections with edge fasteners to match the existing,or a minimum of 10d common nails at four inches on center at the edges.Replacing the damaged floor sheathing will require the removal and replacement of the lightweight floor topping at the interior of the unit. DEI recommends removing the damaged joist ends and treating the cut end in accordance with the General Wood Remediation Guidelines on sheet S1.0.The floor joist damage appears to follow the top face of the joists and the damage reduces in depth along the joist length.Where the floor joist damage is limited to three inches maximum approximately seven inches from the end, DEI recommends adding PSL blocking to retrofit the joist end connection per SK-6.The PSL blocking can span three joist bays between two undamaged floor joists. If floor joist damage exceeds the limits per SK-6, DEI recommends installing a supplemental full length 2x joist spanning back to the interior bearing wall.The supplemental full length joist should be stitched to the remaining competent portion of the existing joist with two 10d common nails spaced at six inches on center.Once the supplemental joist is installed,sawcut and remove the damaged joist end. PAGE 3 OF 6 3j �