Tie rods/reinforcement on high-pressure or large duct are not field-invented details. Stop fabrication/close-up until the approved engineer/shop detail and manufacturer sequence are in hand.
Find the pressure class, duct size, reinforcement/tie-rod note, and approved detail.
Confirm rod size, spacing, attachment, hardware, and whether the detail affects insulation/seal/access.
Get manufacturer/shop/engineer instruction before building the joint.
Stage the hardware before lifting or closing the duct.
Ask if nobody on the crew has installed this detail before.
Ask foreman
This high-pressure duct calls for tie rods/reinforcement and we do not have the approved install detail in hand. Can we get the engineer/shop/manufacturer detail before fabricating it?
Do not
Do not invent tie-rod spacing, attachment, or hardware because the PM said to “figure it out.”
Why it matters
High-pressure reinforcement affects duct strength, leakage, inspection, and sometimes engineered approvals. Guessing the detail can create major rework.
Search words: tdc ductmate flange reinforcement tie rods reinforcement high pressure duct tdc engineer detail manufacturer instructions pressure class
