1.9 KiB
id, aliases, tags, title
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Distributed Antenna Systems (DAS) |
Distributed Antenna Systems (DAS)
Info
Emergency Responder Radio Communication Systems (ERRCS)
Relevant Standard: NFPA 1225
Cellular Systems
Less common than ERRCS are "cellular DAS" systems
Sequence
1. Preparation
Complete fire-alarm-takeoff preparation and takeoff.
2. Takeoff
FACR to Every Elev. Shaft
COMMON ASSEMBLIES/FIRE ALARM & DAS SYSTEMS/DAS ASSEMBLIES/FACR TO ELEV PIT = ...
Match Fire Alarm takeoff Length and Count
FACR to Every Staircase
COMMON ASSEMBLIES/FIRE ALARM & DAS SYSTEMS/DAS ASSEMBLIES/FACR TO STAIRWELL = ...
Match Fire Alarm takeoff Length and Count
Stairwell Riser Every 2 Floors
COMMON ASSEMBLIES/FIRE ALARM & DAS SYSTEMS/DAS ASSEMBLIES/STAIRWELL RISER EVERY 2 FLRS = 1 1/2" EMT (20') W/ 16X16X6 BOX
Create a Stairwell typical on every other floor
FACR to Electric Room
COMMON ASSEMBLIES/FIRE ALARM & DAS SYSTEMS/DAS ASSEMBLIES/FACR TO 2HR-RATED RM = 2" PVC40
Match Fire Alarm takeoff Length
Electric Room Riser to Every Floor
COMMON ASSEMBLIES/FIRE ALARM & DAS SYSTEMS/DAS ASSEMBLIES/2HR-RATED RM RISER TO EVERY FLR = 2" EMT (15') W/ 16X16X6 BOX
Takeoff in every Electric Room
Top 2H Rated Room To Roof
COMMON ASSEMBLIES/FIRE ALARM & DAS SYSTEMS/DAS ASSEMBLIES/TOP 2HR RATED RM TO ROOF = 2" EMT W/ RMC WEATHERHEAD & IMC STUB
Use 15' or Height of ceiling on last building level
Horizontal
CORRIDORS EMT OH = 1 1/2" EMT W/ 16X16X6 BOX EVERY 80' CA.28.31.23
CORRIDORS DECK = 1 1/2" PVC40, STUBBY, FLEX W/ 16X16X6 BOX EVERY 80' CA.28.31.21
1-1/2 through corridors w/ 16x16x6 J-Box
Length for every corridor/garage