dti installation sheets
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All bolts in bridges must be designed as slip-critical, and therefore must never allow slip at service loads. DTI’s give 100% assurance that every bolt has been tensioned correctly.
But bridge connections typically contain a large number of bolts. It’s an inspection nightmare. How to do it? DTI’s. No torque wrenches are needed, and the inspection can be done at any time.
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From small cogen plants to combined cycle gas turbine generators to large multiple unit fossil-fueled monsters, DTI's are simple to use in any part of the world by any workforce. No turn, no torque, just squash the bumps. And where the loads are large, reversing, caused by earthquakes, that's important.
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Seismic bracing, ductile moment resisting connections, large diameter bolts, slip-critical or fully tensioned shear/bearing connections, bolts and welds in combination, are typically found in this type of frame. These characteristics frequently present the project team with some of the most difficult connection situations. DTI’s guarantee that the bolting has been done correctly.
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Large cantilever connections, tension rings, heavy long span trusses, oversized or slotted holes, all favor meticulous bolting practices, therefore making DTI’s the best quality assurance choice.
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Crane loads, reversing live loads in pipe racks, large dead load forces, all have to be accommodated in the design. At the same time, large diameter bolts, oversized holes, high prying forces, galvanized bolts, all conspire to defeat proper bolt tensioning. This is where DTI’s shine, especially Squirter® DTIs.
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Where huge volumes of air flow through equipment, bolts must resist constant live vibration loads. DTI's allow equipment installers to easily and reliably achieve high accurate clamping forces within all the connections involved.
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OEM designers, often using SAE J429 bolts, have historically used torque specifications in an attempt to indirectly control clamping force. More and more frequently now, realizing DTI's can directly control clamping force, OEM engineers are adding DTI's (including SQUIRTER® DTIs) as a backup.
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