Spring Isolation Curb Specifications: What Belongs in the Submittal?
The eight items a reviewer looks for in a spring isolation curb submittal, from stamped drawings to the weld map, and what AIA A201 asks of the GC first.
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Every Custom Curb article tagged HVAC Roof Curbs, newest first.
Mission-Critical Construction Terms Every Data Center GC Should Know
Tier III, N+1, CMAR, GMP, Cx, behind-the-meter, RFIs and CCDs: the mission-critical terms a data center GC meets, defined by the body that owns each one.
Read MoreSpring Mount Roof Curbs on Data Center Builds: Where the Mounts Sit and Who Should Buy Them
Spring mounts sit between the base and upper curb, on the interior rail. Which mounts a data center roof needs, and why the GC should buy them with the curb.
Read MoreSpring Deflection Sizing: When to Use 1", 2", or 3" Mounts
Match static deflection to disturbing frequency with fn = 3.13/√δ: the RPM tiers, a worked example, VFD turndown, and sizing to the load at each mount.
Read MoreGalvanized vs. Aluminum Roof Curbs: Which Fits a Data Center Roof?
Galvanized G90 steel is the data center default because the curb is load-bearing. Where aluminum fits instead, and why mixed-metal joints need isolation.
Read MoreHow Is a Roof Curb Pitch-Corrected for a Sloped Roof?
A tapered sidewall absorbs the deck slope so the top plate sits level within 1/8". How the taper, corner gussets, and crickets are engineered.
Read MoreMission-Critical Procurement: Add a New Roof Curb Supplier in 5 Days
A material supplier ships a product; a subcontractor sends labor. That distinction is why a curb vendor-add runs five business days, not five weeks.
Read MoreSpring Isolation vs. Rubber Isolation: Which One Belongs Under Your Rooftop HVAC?
Springs deflect inches, rubber pads a fraction of one. How deflection sets isolation efficiency, and which method belongs under a rooftop HVAC unit.
Read More7-Point Checklist for a Mission-Critical Roof Curb Spec
Weld type, material, pitch correction, isolation, attachment, submittal turnaround, lead time. What each item should say on a Tier-3 spec, and the red flag.
Read MoreData Center Roof Curbs: What a GC Should Ask Before Specifying One
The curb sits on the critical path between structure and HVAC set. The three curb types a data center build needs, and five questions to ask a supplier.
Read MoreWhy Factory HVAC Curbs Fail on Sloped Metal Roofs: The PEMB Problem
A factory curb built for a flat deck has no way to compensate for the 1:12 pitch of a pre-engineered metal building. The four failure points that follow, and…
Read MoreRoof Curb DWG Files: Formats, Dimensions, and How to Request a Stamped Detail
What a roof curb DWG contains, which format to request (DWG, DXF, RFA or IFC), the eight elements to verify before submittal, and how to get a stamped detail.
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