SOUNDSTAGE FLOORS, TRUSSES, AND ELECTRICAL

Soundstage Floor Loading
The soundstage floors at WB are supported by a combination of girders, joists and posts. The floor in general, consists of a top layer of 3/8-inch "Crestform" material. The 2nd and 3rd layers were originally lx6-inch tongue-in-groove planks; one layer arranged diagonally, the other horizontally. In some cases, 3/4 to 1-inch of plywood has replaced all or part of the planking.

Generally, this multi-layer floor rests atop (2x6 to 2x9-inch) joists. The joists are perpendicularly supported by (6x6 to 8x8-inch) wood girders, which in turn, are supported by (6x6 to 8x8 inch wooden posts at 6 feet on center. 2 to 4-inch diameter steel posts are also used. The posts rest on pressure-treated "Sleeper" planks and/or concrete blocks.

Do not allow water to saturate the soil under any soundstage, since this will greatly reduce the floor’s load bearing capacity. Significant flooding beneath a soundstage requires a sub-floor inspection. CALL OPERATIONS (4-1501).

Stages 1, 2, 3, 4*, 5, 10, 11, 12, 14, 15*, 17, 18, 19, 21, 22, 24, 25, 26, 27, 27A, 28, 28A, 30, and 31 are subject to the posted weight restrictions listed below.

UNIFORMLY DISTRIBUTED WEIGHT
Temporary load capacity for uniform, distributed loads is 200 PSF (pounds per square foot).

VEHICLE WEIGHTS (Concentrated wheel loads)
Basic Maximum Gross Vehicle Weight (GVW, which is vehicle wt. + load wt.) for the stage is 10,000 lb.*(A concentrated, safe, per-wheel load has been determined to be 2500 lb. per wheel, based on the weight distribution of a 4-wheel vehicle. (4 wheels x 2500 lbs. = 10,000 lbs. Max. GVW). Gross Vehicle Weights in excess of 10,000 lb. up to 12,000 lb. (vehicle wt. + load wt.) must use one layer of standard "Grip Track” (2-3/4-inch x 15-inch x 20-feet) between the tires and floor. Contact the Grip Dept. (x4-2554) for grip track. Gross vehicle weights in excess of 12,000 lb. have additional precautions! Contact WBSF Safety & Environmental Affairs (S&EA) at x 4-2800.

*Stages 4 and 15
These stages have covered tanks beneath the floor. Vehicle weights in excess of 10,000 lb. stationed over any of these tank covers require special measures. Contact Operations or S&EA.

Stage 16
The tank cover for the lower tank consists of plywood decking between steel joists. The gap between the joists is approximately 12”. This cover is designed for a permanent live load of 200 PSF, or a temporary concentrated load of 50,600 lbs. spread over 6’ x 6’ blocking.

Stages 6, 29, 32, 33 and 34
These soundstage floors consist of a concrete slab topped by two or more layers of plywood with a top-most layer of 3/8-inch "Crestform" material. This slab floor will support a substantial amount of weight. Contact OPERATIONS or S&EA when vehicle gross weights in excess of 15,000 lb. are anticipated.

Stages 7*, 8 and 9
These soundstage floors consist of a concrete slab topped by two or more layers of plywood with a top most layer of 3/8 inch "Crestform" material. This slab floor will support a substantial amount of weight; however, extra precaution should be taken around the moat like space surrounding this concrete slab. Beneath this floor, a 10-foot wide and 2-foot deep space surrounds this stage's concrete slab like a moat. The plywood and Crestform floor over this moat is supported by a combination of girders, joists and posts.

Vehicles with gross weights (vehicle wt. + load wt.) in excess of 12,000 lb. are allowed, however, a layer of standard grip track (2 3/4" x 15" x 20') shall be used to cross the 10 foot border area.

• Stage 7* has a covered pit beneath the north central portion of the floor (outlined in yellow). The Stage 7 pit cover maximum vehicle gross weight is 10,000 lb. or 2,500 lb., per-wheel load.
• The Stage 7 pit cover has an access hatch. No vehicles or heavy equipment are allowed over this hatch. Temporary load capacity over the pool cover for uniform, distributed loads is 200 PSF.

Stage 20
This soundstage floor consists of a single top layer of 1 1/8" plywood. The plywood rests on 2" x 4" (lying flat on 24" centers) sitting on a concrete slab. The maximum allowable wheel load is 1,400 pounds.

Stage 23

Trusses

• Top chord 12 pounds per square foot (psf) over horizontal projected roof area
• Bottom chord 70 psf over horizontal projected area at bottom chord, plus two 5,000 pound point loads located anywhere along the bottom chord or 1,400 pounds per linear foot along bottom chord, plus two 5,000 pound point loads located anywhere along the bottom chord

Permanents (Glu-lam Grid Framing)
70 psf over horizontal projected area at grid framing, or and Catwalks (Wood Planks) 280 pounds per linear foot along each glu-lam, or a single 2,000 pound point load anywhere along each glu-lam

Floor (Concrete Slab)
250 psf over floor area

Please note the following:          •Vertical loads listed above may not be applied simultaneously.  For example, 
a truss can not  support its stated maximum vertical load at the same time the 
permanents on each side of the truss are supporting additional loads.
•Vertical loads may not be applied to the horizontal  or vertical rod members, 
tube steel members at the bottom chords of the trusses, or to the diagonal 
members of the trusses.            
• Lateral loads may not be applied to the trusses or permanents.

If loading conditions vary from the parameters listed above 
(e.g. simultaneous loading to a truss and the adjacent permanents, 
irregular loading patterns etc.), contact Operations or S&EA for guidance.

Stage 29

Trusses
Top Chord: 12 pounds per square foot (psf) over horizontal projected roof area
Bottom Chord:70 psf over horizontal projected area at bottom chord, or 1,400 pounds per linear foot along bottom chord, or 5,000 pound point 
load no closer than 4 feet on center along the bottom chord 

Catwalks
40 psf over catwalk area or
160 lbs per linear foot along catwalk

Permanents (Glu-lam Grid Framing)
70 psf over horizontal projected area at grid framing, or
280 pounds per linear foot along each glu-glam, or
a single 2000 pound point load anywhere along each glu-glam

Floor (Concrete Slab)
250 psf over floor area
30,000 pound point load no closer than 20 feet on center in each direction

Please note the following:          •Vertical loads listed above may not be applied simultaneously.  For example, 
a truss can not  support its stated maximum vertical load at the same time the 
permanents on each side of the truss are supporting additional loads.
•Vertical loads may not be applied to the horizontal  or vertical rod members, 
tube steel members at the bottom chords of the trusses, or to the diagonal 
members of the trusses.            
• Lateral loads may not be applied to the trusses or permanents.

If loading conditions vary from the parameters listed above 
(e.g. simultaneous loading to a truss and the adjacent permanents, 
irregular loading patterns etc.), contact Operations or S&EA for guidance.

Contact Operations (x4-1501) or S&EA (x4-2800) whenever you have questions regarding the soundstage floors!

ROOF TRUSS AND PERMANENT LOADING

  1. Whenever possible, load at roof trusses directly.
  2. Load only at nodes of trusses. Do not load at center.
  3. Contact S&EA at x4-2800 prior to loading trusses/permanents.
  4. With engineering approval, trusses are rated for 5,000 lb
  5. Engineering approval is required for any unusual load requirements.
  6. Check connection of permanent (6”X8”) to truss prior to load application.
  7. Loads at permanent beams perpendicular to trusses shall not exceed the following:
    • 500 lb. for a single load
    • 300 lb. for two loads (do not apply more than two loads).
  8. Do not apply loads at boards of walkways.
  9. Do not load single “Green Sticks” beyond 100 lb.