1903 OAKES AVE 2018-04-13 - Laserfiche WebLink

DRAWN BY: GENERAL NOTES (continued) ELmEcH 2. When existing footings and stem walls are replaced in sections, the person performing the work shall take care (b) Cleaning of the hole Follow manufacturer's recommendations, The depth required for embedment must be free to insure that all reinforcing steel shall be lapped a minimum of 24 inches and shall be doweled into the existing of debris. This rule does not apply to drop—in anchors that rely on the bottom of a clean drilled hole to set Industrial Services LLC concrete with adhesive or drypack a minimum of 8 inches. the expansion element. M1aiyi•nd J Washington DC I Northern VA 3. The repair of damaged footings or stem walls or the continued use of archaic building materials such as (c) Torque requirements: A minimum torque setting equal to the installation torque or 30 ft lbs. for 1/2 inch bolts unreinforced masonry, requires that plans and calculations be prepared by a licensed architect or engineer. and 40 ft lbs. for 5/8 inch bolts, which ever is greater, is required for all expansion bolts unless this value 410-530-5364 4. All load bearing concrete foundations shall have a minimum of 1— #4 horizontal rebars within the top 6" of exceeds the maximum torque allowed by the manufacturer specifications. In those cases, the torque shall be se- the wall, maintain a minimum of 1" separation between rebars, and maintain a minimum 3/4" of continuous to its maximum allowable value. cement cover. H. ANCHOR SIDE PLATE INSTALL110N G. ANCHOR BOLT INSTALLATION 1. Anchor side plates may be substituted for vertically placed chemical or mechanical anchors only when conditions NOTES: 1. General Requirements prevent anchor or bolt installation vertically through the sill plate. This condition commonly occurs when there is no pony wall or one of greatly reduced height (a) Condition of existing concrete: All concrete shall be fully cured and hardened, not structurally weakened by 2. A minimum of two anchor side plates must be installed on each piece of sill plate 32 inches or longer. The cracking and in sound condition. Concrete with excessive cracking, deterioration or damage shall be replaced. nearest edge of the plate shall be installed a minimum of 9 inches but not more than 12 inches from the end of (b) Condition of existing anchor bolts: Existing sill plate anchor bolts cast in concrete and in sound condition shall the sill plate. be permitted to provide all or a portion of the sill plate connection required if the anchor bolt diameter and 3. Installation of the anchor bolts in the existing concrete shall follow the information in Section G except as spacing meet or exceed the requirements in the Summary of Minimum Prescriptive Requirements and the sill plate is connected to a snug tight condition under the torque test requirement. noted herein. Care shall be used to insure the drilled hole depth does not exceed 2/3rds of the stem wall thickness. Cleaning of the hole is required. (c) Drilling of the hole in concrete: The drilled hole diameter and minimums for spacing, depth of hole and edge 4. Lag screws and wood screws used to attach anchor side plates shall be installed as follows: distance must comply with an ICC Evaluation Report or equivalent approval and manufacturer's (a) The lag or wood screw shall be located at the center of the plate thickness and shall penetrate the sill plate recommendations. All holes shall be dulled with carbide—tipped drill bits conforming to ANSI Specification B94— 12-77 tolerances (1/2 = 0.520-0.530, 5/8 = 0.650-0.660 inches). Worn drill bits with reduced diameters below a minimum of 2-1/2 inches. the ANSI tolerance limits shall not be used. All holes shall be driven as perpendicular as possible to the concrete (b) Lead holes shall be pre—dulled for the threaded portion of the screw as follows: surface. lag screw. The pre—drill diameter for the lead hole shall not exceed 70% of the shank diameter and shall (d) Choosing between mechanical or chemical anchors: Mechanical or chemical anchors may be used interchangeably be drilled to the full depth of penetration of the lag screw. Use a 1/4 inch diameter drill bit for 3/8 inch SEAL in concrete of average or better quality. Concrete of weaker quality may be indicated by spelling during drilling lag screws and 1/8 inch drill bit for 1/4 inch lag screws. or setting of expansion bolts or failure of anchors to reach the minimum torque required. Chemical anchors must (c) Clearance holes shall also be drilled for the solid portion of the shank as follows: be used in weaker quality concrete. This requirement does not waive the need to replace existing concrete lag screw. The clearance hole shall be equal in depth and diameter to the solid portion of the shank. foundations when damaged, deteriorated, or of unsuitable quality. (d) The threaded portion of the lag or wood screw shall be inserted in its lead hole by tuming with a wrench 2. Requirements for Installing Chemical Anchors. and not by driving with a hammer or other blunt object. (a) Cleaning of the hole: The hole must be cleaned with a vacuum attachment, hole brush, and/or compressed (e) Soap or other lubricant shall be used on the lag or wood screws or in the lead holes for ease of installation air. No debris or dust shall remain in the hole. and to prevent damage to the lag screw. (b) Placement of the adhesive: The resin, filler and hardener shall be thoroughly mixed before placement in the hole unless approved to be mixed in the hole. Compounds dispensed through a static mixing nozzle must be 5. Wood shims may be required to fill the space between the inside edge of the sill plate and the edge of the of uniform color. Ensure uniform color by extruding a small amount of adhesive until color uniformity is concrete stem wall. See manufacturer's instructions. achieved. Adhesive added to the hole shall be applied at a slow enough rate to prevent the formation of air voids. Adhesives must be installed within the manufacturer's recommended temperature range for the air and i. PONY WALL BRACING. VENTILA110N & FRAMING CLIP INSTALLATION concrete. 1. The length of the stuctural panels along the foundation shall be at least 48 inches or two times the height ENGINEER: of the wall, whichever is greater. Bracing is required at all exterior walls. Structural panels installed on C (c) Placement of the threaded rod: The all thread rod, completely free of rust, scale or oil, shall be installed to the individual pony wall sections shall be nearly equal in length and nearly equally spaced along the wall. Nails 1 full depth of the hole. The rod shall be turned counter—clockwise sufficiently during installation for the shall be 8d common with a minimum shank diameter of .131 inches. adhesive to engage the threads. The length of the rod shall extend a minimum of one rod diameter above the 2. Framing members or blocking shall be provided at the edge of all wood structural panels. nut after tightening. 3. Panel joints shall occur on the joint of double studs when these are nailed with 16d sinker nails at 4 in. o.c. (d) Adhesive setting time: No torquing of the anchors shall occur until the adhesive has cured for the 4. Panel joints shall maintain a 1/8 inch separation between panels for expansion. recommended time based on the temperature as shown in the manufacturer's instructions. Care must be 5. Panels may be oriented horizontally or vertically. a used to insure that the anchor bond is not disturbed until the adhesive has sufficiently cured. 6. Nails shall be driven flush but shall not fracture the surface of the structural panel sheathing, both edge and (e) Torque requirements: A minimum torque setting of 30 ft lbs. for 1/2 inch anchors and 40 ft lbs. for 5/8 inch field nailing. When a nail fractures the sheathing it shall be left in place and not counted as part of the required 206-784-7275 anchors is required for all chemical anchors for the snug tight condition unless this value exceeds the nailing. A new nail shall be driven flush to the surface within 2" of the discounted nail. maximum torque allowed by the manufacturer specifications. In those cases, the torque shall be set to its 7. Existing crawl space ventilation must be maintained and not covered by the structural panels used to brace the maximum allowable value. pony wall. 8. Where obstructions such as crawl space ventilation openings or mechanical utilities cannot be avoided in the = 3. Requirements for Installing Mechanical Anchors panel length, the required panel length shall be increased be the length of the obstruction or a minimum of one (a) Drilling of the hole: Care must be used to insure that the drilled hole carefully matches the depth and diameter stud spacing, whichever is greater. ;II requirements for the bolt type. The depth of the hole cannot exceed 2/3 of the concrete thickness in the 9. Framing clips shall connect the top plate to a rim joist or to joist blocking, or in the case without a pony wall, direction of the drilled hole. This is critical at the application of anchor side plates to full height concrete stem shall connect the sill plate to a rim joist or to joist blocking. They shall be installed with their long dimension . walls. horizontal and with all of the nail holes filled with approved nails or wood screws. = !! & ! NoW. RETROFIT Lt REMaIELING,--- ---