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88-25: Minimum Edge Distance for Expansion Anchor Bolts UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF NUCLEAR REACTOR REGULATION WASHINGTON, D.C. 20555 May 16, 1988 Information Notice No. Notes; BS EN 1993-3 2005 supersedes this standard and the edge distances in this standard seem to be a bit less than the ones I have listed. Effect of Abandoned Holes on Capacity of Wedge Bolts.pdf. But as per the Eurocode EN 1993-1-8, min edge distance shall be 1.2 times hole dia. In residential construction, placing anchor (j bolts) for the sill plate, I have always read that it's best to stay towards the outside edge of the foundation and face the J portion towards the interior of the home. Because the base-plate holes are oversized and the anchor rod is rarely centered in the hole, a heavy plate washer is required as illustrated in Figure 7.1.6-1(a); see also 7.2.4. Id or 4" min. Test Specimens ..... 7 2. Joined May 12, 2010 Messages 1,704. Anchors, University Study, Reference. the slab edge distance was less than 50 mm, anchors frequently failed, particularly where masonry header blocks were used. Anchor bolt edge distance 1.75 inches or 2.75 inches, dependent upon sill plate . Bolt Spacing rm 16d 24d 24d Minimum Edge Distance for Shear mv \2d \ld lid Minimum Edge Distance for Tension mt 5d or 4" min. Comparison of 5/8 in. … The connection is also used at the base of the column where a base plate is connected to the foundation by means of anchor bolts. Rule: Mechanical type anchors should not be set a minimum of 5 anchor diameters from an unsupported edge. l e = distance between prying force and bolt centre line and is the minimum of either the end distance or the value given by, where, β = 2 for non-pretensioned bolt and 1 for pretensioned bolt . Description: Very useful and easy to use spreadsheet for designing all common types of holding down bolts. Example 1: Bolted Splice – Bolt Check 12.5.1 Geometry Factors, C • Edge distance = 3-5/8” • l/D =/D = lm /D = 151.5/1”/1 ” =15<6= 1 .5 < 6 • 1.5D minimum = 1.5” < 3-5/8” OK • C = 1.0 30 Rolled and welded sections". edge distance from the anchor bolt centre () edge distance in direction 1 (direction 2) characteristic edge distance for ensuring the transmission of the characteristic resistance of anchor bolt minimum allowable edge distance diameter of anchor bolt or threaded diameter outside diameter of anchor bolt nominal diameter of drilled hole Values for Lj, rm, mv, mt Bolt Type (ASTM1 A307 A325 A449 Development Length Ld \2d lid 17d Minimum . for rolled edges of plates and 1.25 in for sheared edges. M. Mark K Platinum Member. Two-Bolt Tests ..... 9 vi . Holding Down Bolts Design Spreadsheet to BS5950, BS8110 for cast-in, post-drilled and with anchor plate holding down bolts. Id or 4" min. This edge distance is used in calculation of the bearing resistance of the fastener, so just using actual above value in that eq will solve my problem? The minimum values are: e 1 ≥ 1.2 d 0 , e 2 ≥ 1.2 d 0 , p 1 ≥ 2.2 d 0 , p 2 ≥ 2.4 d 0 , where d 0 is the diameter of the hole, e 1 , p 1 are measured parallel to the load transfer direction and e 2 , p 2 are measured perpendicular to the load transfer direction. Explanation: If set too close to an unsupported edge, the outward pressure of the concrete anchor will decrease the holding value of the anchor or make it non-existent. 2 / DESIGN GUIDE 1, 2ND EDITION / BASE PLATE AND ANCHOR ROD DESIGN The vast majority of building columns are designed for axial compression only with little or no uplift. It is not a structural connection, but it is for mounting of equipment lug or base plate. Anchor bolt edge distance 1.75 inches or 2.75 inches, dependent upon sill plate Testing protocol monotonic versus pseudo-cyclic Wood-concrete interface condition friction versus “frictionless” membrane To properly generate test data for the purpose of assessing behavior, a new displacement based loading protocol was developed. b e = Effective width of flange per pair of bolts . 2.1.1 Anchor Bolts and Nuts 2.1.2 Plates 2.2 Base Plate Design for Fabrication 2.2.1 Material versus Labor 2.2.2 Welding 2.2.3 Base Plate Dimensions DESIGN GUIDELINES RELATED TO ERECTION 3.1 Anchor Bolts 3.1.1 Anchor Bolt Position Mislocation 3.1.2 Rotated Anchor Bolt Patterns 3.1.3 Anchor Bolts Set Too Low or Too High 3.1.4 Columns Next to Walls 3.2 Washers 3.3 Base Plate Leveling … Table J3.4 specifies minimum edge distances for sheared edges, edges of rolled shapes, and gas cut edges. Apr 21, 2011 #4 Anchor bolts with 1/2" edge distance are unacceptable for both the concrete and the wood. I have only the 13th edition. Tensile Tests ..... 6 3. edge distance cmin [mm] 40 45 55 65 90 120 Min Base thickness hmin [mm] 110 120 140 170 220 270 Tensile NRd Pull-out N*Rd,p [kN] 10.1 13.6 19.7 23.6 46.0 61.3 The rules in Section D.8 refer to spacing, edge distances, and hef (effective embedment depth). The maximum sizes of holes for bolts are given in the table below, except that larger holes, required for tolerance on location of anchor bolts in concrete foundations, are permitted in column base details. t = Thickness of the end plate. Friction between base plate and the grout or concrete surface n u c c V P f A ` m 0.2 The friction coefficient (m) is 0.55 for steel on grout and 0.7 for steel on concrete 2. AISC Specification J3.10 indicates the bearing strength of plates at bolt holes. The table number may be different in the latest edition. Edge Distances. For an 8" thick concrete wall, I have always used ~3" in from the edge. The AISC specifications for structural steel for buildings have the following provisions for minimum edge distance: The distance from the center of a standard hole to an edge of a connected part should not be less than the applicable value from Table 5.7 nor the value from the equation Design of Base Plate with Shear Four principal ways of transferring shear from column base plate into concrete 1. Minimum Edge Distance for Punched, Reamed, or Drilled Holes ..... 3 2. Basic loading data (for a single anchor) – with minimum edge distance Design resistance [kN] - uncracked concrete, 32 Mpa Anchor size M8 M10 M12 M16 M20 M24 Min. Keep in mind that these are minimum requirements, that is, not to exceed spacing. Minimum and maximum spacing p 1, p 2 and edge distances e 1, e 2 for bolts are given in EN1993-1-8 Table 3.3. For such col-umns, the simple column-base-plate connection detail shown in Figure 1.1 is sufficient. Reply Moment resisting connections will be dealt with in the next chapter. normally the anchor bolt holes on base plate are much bigger than anchor bolt diameter due to cast-in anchor bolt construction tolerance, while the anchor stud is rigidly welded to the base plate. The welding of rod to washer involves a fillet weld profile with a weld length that is equal to pi (31.4) times the rod diameter, which develops relatively little strength. I~ I I I I I I I I I I I I I I LIST OF FIGURES Figure Page 1. Code of practice for design. Information Notice No. This allowed a 2x6 plate to have the anchor be about 1/4" off center of the board. The values of e 2 in the second table are based on typical connections used in the UK and values of e 2 in the third for Class 8.8 and 10.9 bolts table … Minimum Edge Distances as identified in BS 5950-1 2000 "Structural use of steelwork in building. The recommendations for The Simpson SSTB are only appropriate for that product. Single-Bolt Test Data to Various Design Equations ..... 13 4. Test Fixture ..... 11 3. Two bolts are required per plate section. Standard holes shall be provided in member-to-member connections, unless oversized, short-slotted or long-slotted holes in bolted connections are approved by the designer. ticular base plate mounting Table IB. 1 Concentric Connections . They apply to all failure modes and should be addressed before starting the design. (a) (b) Fig. • The design bearing strength at bolt holes is φRn ... See Table J3.4, minimum edge distance = 1 in. When dealing with the IBC reference Table 1911.2. base plate.JPG: Description: baSE PLATE DRAWING : Filesize: 26.38 KB: Viewed: 1833 Time(s) Back to top: Dr. N. Subramanian General Sponsor Joined: 21 Feb 2008 Posts: 5430 Location: Gaithersburg, MD, U.S.A. Posted: Thu Mar 11, 2010 5:43 am Post subject: Re: Anchor Bolt postion in BAse plate: Dear Er Kwusum, I do not …

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