FAQs

Diablo Bolted Splice

CAST CONNEX Diablo™ Bolted Splices are cast steel fittings that enable unobtrusive field bolted splices in circular hollow structural section (HSS) members.
You suggested it was best to use a turning roll but I don’t know what that is/ don’t have one/ looks expensive?

One only need assemble a jig with four wheels sufficient to hold and turn the tubes, a variable speed motor with belt to rotate the brace at the rate required for the welding of the connector to the tube. Anything from dolly wheels to light trailer wheels can be considered and obtained, for example, at an auto scrap yard or auto supply store.

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You suggested it was best to use a turning roll but I don’t know what that is/ don’t have one/ looks expensive?
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Will the qualification of the WPS/PQR impede my bid/fabrication/erection schedule?

No. We provide a Sample WPS/PQR that your welding engineer can use as a starting point to tailor to your equipment, procedures and practices. We will also provide you with two weld test plates of the cast steel material for the actual weld tests. We can ship the test plates ahead of the rest of the order.

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Will the qualification of the WPS/PQR impede my bid/fabrication/erection schedule?
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Why do I need a WPS/PQR?

As the material we use, ASTM A958 SC8620 80/50, is not yet a pre-qualified base metal per AWS / CWB, a WPS needs to be developed and verified with a PQR. Note, however, that the joint is pre-qualified.

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Why do I need a WPS/PQR?
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How do I fire protect the DBS?

You would fire protect the Diablo Bolted Splice similarly to how you would protect rolled steel. If the protection system is Intumescent and cover plates are used, we recommend spraying painting the outside of the covers with the intumescent.

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How do I fire protect the DBS?
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Can the Diablo Bolted Splices be galvanized?

Yes. Note, however, that the vent holes will be require in the HSS or in the casting. Vent holes can be drilled in the end plate of the DBS. Please inquire with Cast Connex for more information.

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Can the Diablo Bolted Splices be galvanized?
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How do I design the bolt group for combined loading?

This can be an engineering challenge. The AISC Steel Construction Manual allows for an elastic method for determining the bending strength of a bolt group. Cast Connex has a spreadsheet that can be used for determining the combined bending and axial strength of the bolt group. Please inquire with Cast Connex for more information.

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How do I design the bolt group for combined loading?
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I have a project that has “Buy America” provisions, do your connectors comply?

We can supply domestically produced connectors, but it’s best if we know of this requirement before the tender so that we can anticipate the order in our inventory.

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I have a project that has “Buy America” provisions, do your connectors comply?
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How can I specify something that is proprietary when the project is government funded?

You can specify the product using language like “Cast Connex Diablo Bolted Splice or approved alternate” but, if an alternate is proposed by the contractor, the design team should consider whether it provides the same structural and architectural performance.

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How can I specify something that is proprietary when the project is government funded?
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What are the typical lead times?

Lead times vary by quantity and connector size and type; but, since we do keep some inventory of all our connectors, shorter than normal lead times can be arranged. Typical lead times are generally 6-10 weeks.

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What are the typical lead times?
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