diff --git a/StDb/idl/fcsEcalGainOnline.idl b/StDb/idl/fcsEcalGainOnline.idl
new file mode 100644
index 00000000000..66881b83450
--- /dev/null
+++ b/StDb/idl/fcsEcalGainOnline.idl
@@ -0,0 +1,10 @@
+/*    fcsEcalGainOnline.idl
+ *
+ *  Table: fcsEcalGainOnline
+ *
+ *       description: // FCS ECal gain online
+ */ 
+
+struct fcsEcalGainOnline {   
+  float gainOnline[1496];     /* gaincorr 2*748 */
+};  
diff --git a/StDb/idl/fcsHcalGainOnline.idl b/StDb/idl/fcsHcalGainOnline.idl
new file mode 100644
index 00000000000..ec43e0fbe01
--- /dev/null
+++ b/StDb/idl/fcsHcalGainOnline.idl
@@ -0,0 +1,10 @@
+/*    fcsHcalGainOnline.idl
+ *
+ *  Table: fcsHcalGainOnline
+ *
+ *       description: // FCS HCal gain online 
+ */ 
+
+struct fcsHcalGainOnline {   
+  float gainOnline[520];     /* gaincorr 2*260 */
+};  
diff --git a/StDb/idl/fcsPresThreshold.idl b/StDb/idl/fcsPresThreshold.idl
new file mode 100644
index 00000000000..acc495d977b
--- /dev/null
+++ b/StDb/idl/fcsPresThreshold.idl
@@ -0,0 +1,10 @@
+/*    fcsPresThreshold.idl
+ *
+ *  Table: fcsPresThreshold
+ *
+ *  description: // FCS Pres Threshold online
+ */ 
+
+struct fcsPresThreshold {   
+  float threshold[384];     /* valley position 2*192 */
+};