Standard DTI FAQs
What changes occurred between the 1994 and the 2000 Research Council on Structural Connections specification?
Research Council on Structural ConnectionsLoad & Resistance Factor Design "Specification for Structural Joints Using ASTM A325 or A490 Bolts"
Summary of Changes Between the 1994 and 2000 Versions As Applied to Bolting Provisions
| Date | Issue Involved | Intended Result | Enforcement Specified |
|---|---|---|---|
| 1994 | Snug Tight Connections | Indeterminate Bolt Tension | Very Loose - A Peened Nut is Sufficient Proof |
| 2000 | Snug Tight Connections | Indeterminate Bolt Tension,But Not Zero | None. Cannot be Just Hand Tight Though. Compacted Plies Mandatory. |
| 1994 | Pre-tensioned Shear/Bearing Connections | Full Bolt Tension | Bolt Tension Inspection Only if Specified by Eng. of Record |
| 2000 | Pre-tensioned Shear/Bearing Connections | Full Bolt Tension | Inspection Mandatory of Bolt Tension in All Situations |
| 1994 | Slip Critical Connections | Full Bolt Tension | Inspection Mandatory of Bolt Tension and Faying Surface Condition |
| 2000 | Slip Critical Connections | Full Bolt Tension | Inspection Mandatory of Bolt Tension and Faying Surface Condition - no change |
| 1994 | Tension Connections | Full Bolt Tension | Inspection Mandatory of Bolt Tension and Faying Surface Condition |
| 2000 | Tension Connections | Full Bolt Tension | Only Bolt Tension Inspection Mandatory, not Faying Surface Inspection |
| 1994 | Bolt Tightening Delay Time | One Shift Max, All Methods | Or What? No Penalty Incurred. |
| 2000 | Bolt Tightening Delay Time | none; Except fasteners removed from the work must be calibrated | Or What? Mandatory Re-qualification of Tightening Method for Entire Bolt Lot |
| 1994 | Pre-Installation Skidmore Test | On Slip Critical or Tension Connections Only | Demonstrate Bolt Assembly Can Achieve 1.05 Times Minimum Preload At Least |
| 2000 | Pre-Installation Skidmore Test | On Pre-tensioned Shear/Bearing and Slip Critical Connections | Demonstrate Bolt Assembly Can Achieve 1.05 Times Minimum Preload At Least |
