diff --git a/qcore/archive_structure.py b/qcore/archive_structure.py
new file mode 100644
index 00000000..8f4abb90
--- /dev/null
+++ b/qcore/archive_structure.py
@@ -0,0 +1,27 @@
+"""
+Gives access to the folder structure of archived cybershake directories
+"""
+from pathlib import Path
+
+from .simulation_structure import get_fault_from_realisation
+
+
+def get_fault_source_dir(fault_dir: Path):
+    """Gets the Source directory for the given fault directory"""
+    return fault_dir / "Source"
+
+
+def get_fault_im_dir(fault_dir: Path):
+    """Gets the IM directory for the given fault directory"""
+    return fault_dir / "IM"
+
+
+def get_fault_bb_dir(fault_dir: Path):
+    """Gets the BB directory for the given fault directory"""
+    return fault_dir / "BB"
+
+
+def get_IM_csv_from_root(archive_root: Path, realisation: str):
+    """Gets the full path to the im_csv file given the archive root dir and the realistion name"""
+    fault_name = get_fault_from_realisation(realisation)
+    return get_fault_im_dir(archive_root / fault_name) / f"{realisation}.csv"
diff --git a/qcore/simulation_structure.py b/qcore/simulation_structure.py
index c72dce39..0531beaa 100644
--- a/qcore/simulation_structure.py
+++ b/qcore/simulation_structure.py
@@ -221,6 +221,13 @@ def get_IM_csv(sim_root):
     )
 
 
+def get_IM_csv_from_root(cybershake_root, realisation):
+    return os.path.join(
+        get_im_calc_dir(get_sim_dir(cybershake_root, realisation)),
+        "{}.{}".format(realisation, "csv"),
+    )
+
+
 def get_IM_info(sim_root):
     return os.path.join(
         get_im_calc_dir(sim_root),