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https://mason-ind.com/pipe-support-systems/
PIPE RISER SUPPORT SYSTEM By: Steve Fey Senior Field Application Engineer Supporting pipe risers subject to thermal expansion and contraction in hi-rise HVAC Systems has presented tremendous problems to the Design Engineer. Standard carbon steel piping expands or contracts at a …
https://www.cfm.va.gov/til/sDetail/Div23HVACSteam/SD233100-15.pdf
duct riser supports note: all duct work risers which are run exposed, such as thru attic floors and fan room floors shall be provided with a 3" [75mm] high concrete curb around opening for duct. seal hole with fireproofing material after duct installation 2"x2"x1/4" [50x50x6mm] angle install on both long dimension sides of duct. duct riser ...
https://www.hpac.com/piping-pumping/article/20928576/dynamics-of-tallbuilding-riser-design-part-1-of-2
FIGURE 1. Riser prior to heating. Consider the riser pipe in Figure 1. It runs the entire height of the building, 50 stories. With a slab-to-slab height of 10 ft, the pipe is 500 ft tall. A typical support for such a pipe is the riser clamp, installed maybe on every other floor.
https://tecoustics.com/wp-content/uploads/2012/07/Riser112.pdf
Supporting pipe risers subject to thermal expansion and contraction in hi-rise HVAC Systems has presented tremendous problems to the Design Engineer. Standard carbon steel piping expands or contracts at a rate of 0.8” (20 mm) per 100ft (30.5 m) per 100°F (37.8°C), so pipe growth of 5” (127 mm) in tall hi-rise structures is common.
https://www.grbx.com/ipin/scans/2012/0900-A/Specs/233113.pdf
and other provisions in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible." ... duct-support intervals, and other provisions in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible." ... H. Trapeze and Riser Supports: 1. Supports for Galvanized-Steel Ducts: Galvanized-steel shapes and plates.
https://www.engineeringtoolbox.com/ductwork-spacing-d_927.html
The support distance for ductwork is typical based upon deflection, stress and cylinder buckling analysis. For sheet metal duct work the space between the …
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