diff --git a/APPL/RES/res.inc b/APPL/RES/res.inc
index ce71fdd0c0..11bdf6cba6 100644
--- a/APPL/RES/res.inc
+++ b/APPL/RES/res.inc
@@ -2089,7 +2089,7 @@ function get_res_deel_sql (params)
 function getScopedResDeelSql(params)
 {
 
-  params = params || {};
+  params          = params          || {};
   params.reg_key  = params.reg_key  || -1;
   params.dist_key = params.dist_key || -1;
   params.loc_key  = params.loc_key  || -1;
@@ -2122,55 +2122,26 @@ function getScopedResDeelSql(params)
   }
 
   // res_deel without alg scope
-  var res_d = "SELECT ds.* "
-            + "  FROM res_v_deelscope ds "
-            + " WHERE ds.res_deel_alg_level = -1 ";
-
-  // res_deel scoped for alg parents
-  var res_d_arr = [];
-  if (alg_level != -1)
-  {
-    switch (alg_level)
-    { // note: no break -> multi switch
-      case 5: res_d_arr.push("ds.alg_ruimte_key     = aob.alg_ruimte_key");
-      case 4: res_d_arr.push("ds.alg_verdieping_key = aob.alg_verdieping_key");
-      case 3: res_d_arr.push("ds.alg_gebouw_key     = aob.alg_gebouw_key");
-      case 2: res_d_arr.push("ds.alg_locatie_key    = aob.alg_locatie_key");
-      case 1: res_d_arr.push("ds.alg_district_key   = aob.alg_district_key");
-      case 0: res_d_arr.push("ds.alg_regio_key      = aob.alg_regio_key");
-    }
-    res_d += "UNION ALL "
-           + "SELECT ds.* "
-           + "  FROM res_v_deelscope ds "
-           + "     , (SELECT * "
-           + "          FROM alg_v_onrgoed_boom aob "
-           + "         WHERE aob." + alg_filter
-           + "           AND ROWNUM = 1) aob "
-           + " WHERE (" + res_d_arr.join(" OR ") + ")"
-           + "   AND ds.res_deel_alg_level <= " + alg_level;
-  }
-
-  // res_deel scoped for underlying alg level
-  if (alg_level > -1 && alg_level < 5) // no underlying alg_scope after 5
-  {
-
-    res_d_arr = [];
-    var temp_sql = "ds.res_deel_alg_level = {0} AND EXISTS (SELECT '' FROM alg_v_onrgoed_boom aob WHERE {1} AND aob." + alg_filter + ")";
-    switch (alg_level)
-    { // note: no break -> multi switch
-      case 0: res_d_arr.push(temp_sql.format("1", "ds.alg_district_key   = aob.alg_district_key"));
-      case 1: res_d_arr.push(temp_sql.format("2", "ds.alg_locatie_key    = aob.alg_locatie_key"));
-      case 2: res_d_arr.push(temp_sql.format("3", "ds.alg_gebouw_key     = aob.alg_gebouw_key"));
-      case 3: res_d_arr.push(temp_sql.format("4", "ds.alg_verdieping_key = aob.alg_verdieping_key"));
-      case 4: res_d_arr.push(temp_sql.format("5", "ds.alg_ruimte_key     = aob.alg_ruimte_key"));
-    }
-
-    res_d += " UNION ALL "
-           + "SELECT ds.* "
-           + "  FROM res_v_deelscope ds "
-           + " WHERE ds.res_deel_alg_level > " + alg_level
-           + "   AND (" + res_d_arr.join(" OR ") + ")";
-  }
+  var res_d = "SELECT ds.res_deel_key"
+            + "     , ds.res_deel_alg_level"
+            + "     , aob.alg_regio_key "
+            + "     , aob.alg_district_key "
+            + "     , aob.alg_locatie_key "
+            + "     , aob.alg_gebouw_key "
+            + "     , aob.alg_verdieping_key "
+            + "     , ds.alg_ruimte_key "
+            + "  FROM (SELECT r2.* "
+            + "          FROM res_deel r1, res_v_deelscope r2 "
+            + "         WHERE r1.res_deel_key = r2.res_deel_key"
+            + "           AND r1.res_deel_verwijder IS NULL) ds "
+            + "     , alg_v_onrgoed_boom aob"
+            + " WHERE ds.res_deel_alg_level = -1"
+            + "    OR ds.alg_ruimte_key = aob.alg_ruimte_key"
+            + "    OR ds.alg_verdieping_key = aob.alg_verdieping_key"
+            + "    OR ds.alg_gebouw_key = aob.alg_gebouw_key"
+            + "    OR ds.alg_locatie_key = aob.alg_locatie_key"
+            + "    OR ds.alg_district_key = aob.alg_district_key"
+            + "    OR ds.alg_regio_key = aob.alg_regio_key";
   // end res_d (res_deel_alg scoping)
 
   var sql1 = "SELECT " + params.select_fields
@@ -2197,7 +2168,7 @@ function getScopedResDeelSql(params)
                      "resd.alg_locatie_key",
                      "resd.alg_gebouw_key",
                      "resd.alg_verdieping_key",
-                     "resd.alg_ruimte_key",
+                     "", // Niet ondersteund FSN#26495
                      params.autfunction,
                      typeof params.sdisc == "number"? params.sdisc : '',
                      "",  // forwrite