vault backup: 2026-05-05 16:45:34

two-way-takeoff.md

@@ -17,25 +17,20 @@ up: "[[takeoff-scripts]]"
 
 > `System` = "FA - Two Way Communication"
 
-%%
-It's curious we use the longer of FCR to elevator lobbies/FCR to stairwells
-rather than just the total length,
-since in high-rises _all_ stairwells with locking doors
-require communication systems per
-[[ibc_s0403#403.5.3.1 Stairway communication system.]]
-%%
-
 ## Horizontal
 
 1. * `Area` = Same as Fire Command Room
 
     `FIRE ALARM & DAS SYSTEMS`/`TWO WAY COMMUNICATION ASSEMBLIES`/`2-WAY COMMUNICATION = 1" CONDUIT ...`
 
-    **Length** = Per drawings if shown, otherwise use longer of
-    * FCR to elevator lobbies
-    * FCR to stairwells
+    **Length** = Per drawings if shown,
+    otherwise measure from FCR to every elevator lobby.
+    For [[pdi-building-types#High Rise|high-rise]] buildings,
+    _also_ measure from the FCR to every stairwell.[^1]
 
-    **Count** = Count of elevator lobbies or stairwells (match length)
+    **Count** = Count of elevator lobbies and stairwells if high-rise (match length)
+
+[^1]: See [[ibc_s0403#403.5.3.1 Stairway communication system.|IBC 403.5.3.1]].
 
 ## Vertical
 
@@ -46,14 +41,18 @@ require communication systems per
     * **Length** = 15ft * Count
     * **Count** = match Horizontal
 
+> [!important]
+> [[sleeving-takeoff]]
+
 ## Firefighter Phone System
 
 > [!important]
 > These are ICC definition two-way communication systems,
 > redundant with the standard takeoff described above.
 > These assemblies can be ignored
-> unless given specific direction otherwise.
-> Confirmed by [[joel-jansen]] 2025-12-08 in reference to [[2100-crystal-drive|2100 Crystal Drive]].
+> unless given specific direction otherwise.[^2]
+
+[^2]: Confirmed by [[joel-jansen]] 2025-12-08 in reference to [[2100-crystal-drive|2100 Crystal Drive]].
 
 `COMMON ASSEMBLIES`/`FIRE ALARM & DAS SYSTEMS`/`COMMUNICATION DEVICES ...`/`...`