block met5 with obstruction
diff --git a/openlane/rapcore/config.tcl b/openlane/rapcore/config.tcl
index a5a9cff..659b97e 100644
--- a/openlane/rapcore/config.tcl
+++ b/openlane/rapcore/config.tcl
@@ -47,3 +47,6 @@
 # Go fast
 set ::env(ROUTING_CORES) 6
 #set ::env(GLB_RT_ALLOW_CONGESTION) 1
+
+# block met5 with obstruction
+set ::env(GLB_RT_OBS) "met5 0 0 800 800"