---
id:
aliases:
  - das
tags:
  - authorship/original
  - destiny/permanent
  - occupational/takeoff/standalone-systems
  - status/draft
  - type/guide
title: Distributed Antenna Systems (DAS) Takeoff
---
# Distributed Antenna Systems (DAS) Takeoff

> [!important]
> Complete [[emergency-systems-research]] before beginning takeoff.

> [!info]
> See [[emergency-communications-systems]] for information
> about Emergency Responder Radio Communication Systems (ERRCS).

> [!info] Cellular Systems
> Less common than ERRCS are "cellular DAS" systems

## Backbone

### FACR to Every Elevator 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

`Area` = "Typical - Building Even Levels"

`COMMON ASSEMBLIES`/`FIRE ALARM & DAS SYSTEMS`/`DAS ASSEMBLIES`/`STAIRWELL RISER EVERY 2 FLRS = ...`

### FACR to Electric Room

`COMMON ASSEMBLIES`/`FIRE ALARM & DAS SYSTEMS`/`DAS ASSEMBLIES`/`FACR TO 2HR-RATED RM = ...`

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 = ...`

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 = ...`

* **Length** = 15ft or height of ceiling on last building level

## Horizontal

> [!important]
> Usually only for cellular DAS.
> Confirm takeoff requirement with [[pdi-estimating#Bid Estimating|Bid]].

`COMMON ASSEMBLIES`/`FIRE ALARM & DAS SYSTEMS`/`DAS ASSEMBLIES`/`CORRIDORS ...`

* **Length** = Length measured  for every corridor/garage
