Common tools and materials used linked in description below;
VIDEO CHAPTERS
0:00 Intro
0:37 Hardware
2:51 Tools
3:46 Platform style and sizing
5:51 Drain pan sizing
6:09 More on hardware
6:33 Break joints
7:09 Locating lag points on a sloped ceiling
8:16 Using pilot bits
9:19 Adding lag points in between joists
11:31 Structural considerations
12:08 Confirming clearances and marking reference points
12:45 Assembly line process in action
12:57 Proper hardware use with a vibration isolator
13:48 Proper riser placement and processes to make work easier
14:53 Hanging the unit
15:22 Working safely
15:47 Unit leveling
16:06 Keeping threads clean
16:27 Closing
• Pre-plan your suspension to avoid conflicts with service area of unit, filter racks on unit, supply and return openings and where your duct work will route to. Also pay attention to where the access hole to get to the unit is at and that you have enough clearance per code to get to the unit.
• Build your platform large enough so that the threaded rods can miss your service and still have room to support the platform. We recommend building wood platforms 9” larger than your threaded rod spacing. This allows room for a 2x4 block on each side of the platform to be install and stop the uni-strut from ever sliding out from under platform. DO NOT BUILD YOUR PLATFORM WITHOUT FIRST DETERMININNG WHERE YOUR THREADED RODS WILL BE!
• Confirm that the structure you are hanging from can support the weight of not only the unit but the platform, all hardware, etc. It is good practice to overbuild for people leaning or stepping on the platform or design changes but do not go too far overboard on springs because if springs are too oversized they will not dampen vibration as much.
• USE PILOT BIT WHEN SETTING LAGS!!! Lag sizes listed at bottom of this page.
• Build drain pan larger than unit, 3” recommended (1” minimum if clearance is tight).
• Install “break joint” at any equipment that may vibrate to stop transfer of vibration into house.
• Use assembly line process and cut all threaded rod, uni-strut etc at one time when possible but be careful to triple check everything before you cut all your material.
Pilot bit sizing;
Softwoods (most framing)
3/32” for 1/4” Lag
9/64” for 5/16” Lag
11/64” for 3/8” Lag
¼” for 1/2” Lag
Hardwoods (some historic houses are framed with harder woods)
3/16” for 1/4” Lag
7/32” for 5/16” Lag
1/4” for 3/8” Lag
3/8” for 1/2” Lag
Tools used;
Makita 9/16" deep socket (18" - 24" recommended)
amzn.to/3v129QO
Dewalt DCS350 threaded rod cutter
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Dewalt cordless grinder
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Common hardware;
1/4" x 2" Sammy Lag (3/8" threaded rod)
amzn.to/3PIIFdA
3/8" x 2.5" Sammy Lag (3/8" threaded rod)
amzn.to/3v3CyqE
5/16" x 1 3/4" Masonry Sammy (3/8" threaded rod)
amzn.to/3uZAxvE
5/16" x 1 3/4" Sammy Lag Swivel (3/8" threaded rod)
www.concretefasteners.com/sam...
76 lb spring loaded isolator
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210 lb spring loaded isolator
amzn.to/3BNBL0V
300-400 lb spring loaded isolator
amzn.to/3Wpq3kE
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