Suspended DJ Booth — Build Document
Design Drawing
6" SOLID TIMBER BEAM — EXISTING STRUCTURE FLOOR 1"–2" CLEAR NO FLOOR CONTACT ~12° 192" 16 FT 37" 72" 84"–90" HANGER SPREAD 1 2 3 4 5 6 7 8 FRONT ELEVATION — NOT TO SCALE — TABLE SHOWN HANGING (NO FLOOR CONTACT) — ⑤ = SETUP/TEARDOWN POINT

FIG 1 — FOUR-POINT SPLAYED CABLE SUSPENSION / LAG EYE BOLT + QUICK LINK BEAM CONNECTION / OPENFORM SEATTLE / CEILING 192" AFF

Drawing Key
1
Spring Hanger Isolator
Mason Industries 30N-X-76 / 76 lb capacity
1.22" rated deflection / 2.5"D × 5.5"H × 2.9"W
2
Lag Eye Bolt
1/2" × 4" forged / 3" thread engagement in beam
Painted white — permanent, minimal visual footprint
3
7×19 Steel Wire Rope
3/16" galvanized / 14 ft per drop
SWL 840 lb across 4 cables / swageless fittings both ends
4
Turnbuckle
Jaw-jaw / 3/16" cable rated / 6" take-up
Set once for height — cable thimble at jaw end
5
Steel Quick Link
Oval / screw sleeve / ≥400 lb rated
SETUP/TEARDOWN POINT — threads through eye bolt + hanger upper rod
6
Forged D-Ring
1/2"-13 thread into recessed T-nut in frame corner
Permanent table hardware — swageless cable end connects directly
7
Table Frame
72"W × 24"D / 2×4 box frame
3/4" oak cabinet ply surface / glued and screwed
8
Swivel Caster w/ Brake
4" stem-mount / 150 lb rated each
For rolling in/out only — airborne when hanging
Full Parts List
RefPartSpecQty
— BEAM CONNECTION —
2Lag Eye Bolt1/2" × 4" forged steel / painted white / 3" thread engagement4
5Steel Quick LinkOval / screw sleeve / ≥400 lb rated — connects eye bolt to hanger upper rod4
— SUSPENSION HARDWARE (per drop × 4) —
1Mason Industries 30N-X-76Spring hanger isolator / 76 lb cap / 1.22" deflection / black4
37×19 Galvanized Wire Rope3/16" dia / 14 ft cut lengths4
3Swageless Cable Eye FittingNorseman or Locoloc / 3/16" wire rope8
4Jaw-Jaw Turnbuckle3/16" cable rated / 6" take-up / galvanized4
4Cable Thimble3/16" wire rope / stainless4
— TABLE FRAME —
7Table Frame Lumber2×4 Douglas fir, 8 ft lengths6
7Oak Cabinet Plywood3/4" / cut to 72" × 24" — from scrap stock1 panel
6Forged D-Ring1/2"-13 thread / forged steel4
6T-Nut (Barrel Nut)1/2"-13 / recessed into frame corner4
8Swivel Caster with Brake4" stem-mount / 150 lb rated each4
—Construction Adhesive + ScrewsTitebond III + 2-1/2" construction screws—
Build Notes

Splay Geometry

  • Eye bolts located 8"–10" outboard of table corner positions on the beam
  • ~12° off plumb provides lateral restoring force — no wall contact needed
  • Use a plumb bob to mark floor positions directly below each eye bolt before drilling
  • Pre-drill pilot hole for each lag eye bolt — 5/16" bit, 3" deep into beam soffit

Set-up / Teardown

  • Lag eye bolts stay in beam permanently — painted white, barely visible at 16 ft
  • Everything else — hangers, quick links, cables, turnbuckles — travels with the table
  • Set-up: roll in, lift each hanger to its eye bolt, thread quick link through both, tighten sleeve — 4 connections, done
  • Teardown: loosen and remove 4 quick links, table rolls out with all hardware attached

Table Height

  • Target surface height: 37" finished
  • Dial in via turnbuckles on first install — mark position with gaff tape
  • Height does not change between events once set

Isolation Logic

  • 30N-X-76 spring hangers attenuate structure-borne vibration from beam
  • Zero floor contact eliminates direct floor bounce transmission entirely
  • Splayed cable geometry provides passive lateral stability — no wall or floor bracing needed
Parts Gallery
1
Spring Hanger Isolator
Mason Industries 30N-X-76 / 76 lb / black
2
Lag Eye Bolt
1/2" × 4" forged / painted white / permanent in beam
3
7×19 Steel Wire Rope
3/16" galvanized / 14 ft per drop
4
Turnbuckle
Jaw-jaw / 6" take-up / galvanized
5
Steel Quick Link
Oval / screw sleeve / ≥400 lb / setup + teardown point
6
Forged D-Ring
1/2"-13 thread / permanent table hardware
7
Table Frame
2×4 box / 3/4" oak cabinet ply top
8
Swivel Caster w/ Brake
4" stem-mount / airborne when hanging