Mislocated Holes in Webs and/or Web Splice Plates
Webs: 1) Hole too close to fee edge. Based on hole position, consider effect on splice capacity of ignoring that bolt..(Min at neural axis), and how close hole is to edge. May be able to justify using "as is". If not sure, evaluate pattern and any holes not yet drilled to see if spacing and edge distance on other holes permit. As a last resort, increase web splice plate size and add a row of bolts. 2) Hole too close to edge of splice plate. Evaluate edge planing. If not adequate, consider enlarging splice depth if physical room permits. If not, see above alternates. 3) Hole too close to adjacent hole. Consider parameters in AISC's "Specification for Structural Joints Using ASTM A325 or A490 bolts" to determine if bolts' installation requirements and contact areas justify using "as-is". If not, see alternates with #1 & #2. |
Web Splice Plates: 5. Bolt too close to edge and this bolt contributes significantly to 1of bolt group. For small error, may be able to plane web edge. For significant error, check vertical bolt spacing to see if bolt(s) can be added within splice plat. May need to change splice. 6. Bolt too close to edge, but this bolt is near neutral axis and primarily carries only vertical shear. Consider planing edge, but if too close, check design loads on bolts to see if this one can be neglected before revising entire splice. 7. Interior bolt. Check if spacing still satisfies AASHTO requirements to leave as-is. If too close to adjacent bolt, consider leaving hole unfilled (in web only) and adding hole as close as possible to correct location. If one location overlaps adjacent hole (looks like a snowman) in web only, since splice plates will cover like hardened washer, consider as oversize hole and check allowable vs. calculated load. If a number of mislocated holes occur in one splice, consider lengthening splice, enlarging bolts, welding plates on both faces or other strengthening measures. 8. Hole too close to adjacent bolt. Consider criteria in 5,6, and 7 above. 9. Hole too close to edge of splice. For small error, may plane edge of splice. For larger error, may widen splice plate if location of flange-web fillet and flange splice plates permit. If not possible to widen plate enough, see #5 above. 10. Hole too close to edge of splice plate. For small error, may plane edge. For larger error, may need to widen splice plate. Consider location of bolt in group and note that stress at this edge of splice plate is low. |