A J bolt has a J shaped head that is sunk into concrete to serve as an anchor bolt The cylindrical portion of the screw from the underside of the head to the tip is called the shank it may be fully or partially threaded The distance between each thread is called The maximum edge distance should not exceed 12 times the thickness of thinner member or 6 in Standard bolt hole spacing is 3 in with the minimum spacing of 2 3 2 times the diameter of the bolt d b Common edge distance from the center of last hole toSTANDARD DRAWING NO DATE DESCRIPTION INDEX OF TRAFFIC STANDARDS SIGNALS TC 8801 10 SHEETS DEC 12 2011 TRAFFIC SIGNAL SUPPORT TC 1993 1 8 nbsp 0183 32 Minimum end distance edge distance and spacing for bolt fasteners according to EN1993 1 8 Table 3 3 rounded up to nearest mm Normal round holes Oversize round holes Slotted holes Size Minimum end distance along load direction e 1 mm e 1 1 2d 0 d The attachment holes should have a minimum distance of 2 inches vertically from the pre drilled holes e DO NOT drill holes where the distance of the edge of that hole would be within 2 inches from the edge of any existing hole 6 The use of wood arms

Effective guardrail systems will have at a minimum A surface that is smooth and free from burrs to prevent punctures and lacerations and to prevent snagging of clothing see 29 CFR 1926 502 b 6 Toprails and midrails that are at least 1 4 inch in diameter see 29 CFR 1926 502 b 9 Minimum base material thickness hmin mm 110 110 110 110 120 140 170 Diameter of clearance hole in the fixture d f mm 9 12 14 9 12 14 18 Minimum spacing a b s min mm 100 100 100 100 100 100 100 Minimum edge distance a c min mm 100 100Lc clear distance between the edge of the hole and edge of the adjacent hole or t connected part parallel to the applied force in L distance from the end of the connected part to the center of the hole in p force that a single connector exerts on thePI 2 Maintain a 6 minimum distance from any slab edge or seam Hole to hole spacing should be a minimum 61 2 in any direction Hole depth should be a minimum of 4 CAUTION 3 DO NOT install on asphalt or other similar unstable surface Columns are 4 Minimum End Edge amp Row Spacing Distances Top Edge Bottom Edge End Row Spacing Ledger 2 190 2 1 5 8 Band Joist 190 2 2 1 5 8 Placement of Lag Screw Bolt in Ledger Board Ledger Stagger Fasteners in 2 Rows 5 Max 190 Min 2 Min 2 Min

b Minimum edge distance 1 7 d o in case of hand cut edges and 1 5 d o in case of rolled or machine cut edges 5 Diameter of bolt hole for various bolts shall be taken as shown below diameter of bolt d 12 14 16 20 22 24 30 36 diameter of bolt hole dPOST amp RAIL FENCING INSTALLATION GUIDE 700mm MINIMUM HOLE DEPTH MAXIMUM 3m INTERVALS STRING LINE 200mm MINIMUM HOLE DIAMETER SPIRIT LEVEL DESIGNING YOUR FENCE Accurately determine the position of the fence in someWall Studs Sec 2326 11 1 Size Height and Spacing The size height and spacing of studs shall be in accordance with Table 23 I R 3 except that Utility grade studs shall not be spaced more than 16 inches 406 mm on center or support more than a roof and a ceiling or exceed 8 feet 2438 mm in height for exterior walls and load bearing walls or 10 feet 3048 mm for interior non bearing The image above depicts the minimum distance of untreated support members from grade Untreated joists should be at least 18 inches away from the ground Girders should be 12 inches away from the ground However in many situations exceptions are made Bolt Pattern Chart A list of cars trucks and other vehicles that swap or interchange wheels with 6 X 5 5 bolt pattern PCD size centerbore offset and wheel dimensions