An outdoor static pressure sensor assembly penetrates a concrete roof slab via a two-inch schedule 80 galvanized steel pipe mast supported by three guy wires secured to roof anchors provided by the general contractor. A field-fabricated steel support bracket and a Grinnell figure 261 clamp secure the lower portion of the mast beneath the slab, terminating with a threaded pipe cap, brass fitting, and copper tubing. The upper end of the mast extends fifteen feet minimum above the roof surface, transitioning through an offset with a two-inch FTP signal connection to the outdoor static pressure sensor furnished by the controls contractor.
CONCRETE ROOF SLAB SHOWN GUY WIRE (3 PLACES) ROOF ANCHOR BY GC THREADED PIPE CAP COPPER TUBING BRASS FITTING RETAINER BRACKET OUTDOOR STATIC PRESSURE SENSOR FURNISHED BY CONTROLS CONTRACTOR 2" SCH. 80 GALVANIZED STEEL PIPE 2" FTP SIGNAL CONNECTION STEEL SUPPORT BRACKET (FIELD FABRICATED) GRINNELL FIG. 261 CLAMP 12" 24" 15 FT MIN
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