diff --git a/spec/structure/parallel_structure.spec.ts b/spec/structure/parallel_structure.spec.ts
index 3e8b6fd12499908e1b6c753a2d9b86795daf0580..f5f0ca22b3b80bb876a8c8bf82168805098b8135 100644
--- a/spec/structure/parallel_structure.spec.ts
+++ b/spec/structure/parallel_structure.spec.ts
@@ -4,10 +4,10 @@
  * Pour exécuter ce code dans le débugger.
  * Faire de même avec le fichier test_func.ts
  */
-// import { describe, expect, it, xdescribe } from "../mock_jasmine";
+// import { describe, expect, it, xdescribe, xit } from "../mock_jasmine";
 
 import { ParamCalculability, ParamDefinition, ParamsEquation } from "../../src/param";
-import { CreateStructure, StructureType } from "../../src/structure/factory_structure";
+import { CreateStructure, LoiDebit, StructureType } from "../../src/structure/factory_structure";
 import { ParallelStructure } from "../../src/structure/parallel_structure";
 import { ParallelStructureParams } from "../../src/structure/parallel_structure_params";
 import { Structure } from "../../src/structure/structure";
@@ -48,7 +48,7 @@ function itParallelStructure(sVarCalc: string, rVcalc: number, Q?: number) {
         const res: Result = pstruct.Calc(sVarCalc);
         checkResult(res, rVcalc);
         if (Q !== undefined) {
-            for (let i = 1 ; i < res.nbResults ; i++) {
+            for (let i = 1; i < res.nbResults; i++) {
                 checkResult(res.extractResult(i), Q);
             }
         }
@@ -65,17 +65,22 @@ const ps2: ParallelStructure = new ParallelStructure(
 );
 
 // Ajout d'une structure de chaque type dans ParallelStructure
-for (const i of EnumEx.getValues(StructureType)) {
-    ps2.addStructure(CreateStructure(i));
-}
+for (const s of EnumEx.getValues(StructureType))
+    for (const i of EnumEx.getValues(LoiDebit)) {
+        try {
+            ps2.addStructure(CreateStructure(s, i));
+        }
+        catch (e) {
+        }
+    }
 
 ps2.prms.Q.v = ps2.Calc("Q").vCalc;
 
 // tslint:disable-next-line:prefer-for-of
 describe("Class ParallelStructure: ", () => {
-    for (let i = 0 ; i < ps2.structures.length ; i++) {
+    for (let i = 0; i < ps2.structures.length; i++) {
         const st: Structure = ps2.structures[i];
-        describe(`this.structures[${i}]: Structure${StructureType[i]}: `, () => {
+        describe(`this.structures[${i}]: Structure${LoiDebit[i]}: `, () => {
             // tslint:disable-next-line:forin
             for (const prm of st.prms) {
                 if (prm.calculability === ParamCalculability.DICHO &&
diff --git a/src/structure/factory_structure.ts b/src/structure/factory_structure.ts
index 3d6d40659e26439aab8f55b8008441a3823423c9..d5fe52f42eff286c6168e3e3e7dae331fcde6ea3 100644
--- a/src/structure/factory_structure.ts
+++ b/src/structure/factory_structure.ts
@@ -8,6 +8,12 @@ import { StructureOrificeSubmerged } from "./structure_orifice_submerged";
 import { StructureWeirFree } from "./structure_weir_free";
 
 export enum StructureType {
+    VanneRectangulaire, SeuilRectangulaire,
+    // VanneCirculaire,
+    // VanneTrapezoidale, SeuilTrapezoidal
+}
+
+export enum LoiDebit {
     // loi de débit Déversoir / Orifice Cemagref 1988
     Cem88d,
     // loi de débit Déversoir / Vanne de fond Cemagref 1988
@@ -22,28 +28,63 @@ export enum StructureType {
     WeirFree
 }
 
-export function CreateStructure(structureType: StructureType): Structure {
-    const structPrms: RectangularStructureParams = new RectangularStructureParams(
-        0,  // Q
-        100,        // ZDV
-        102,        // Z1
-        101.5,      // Z2
-        2,          // L
-        0.6,        // Cd
-        0.5         // W
-    );
+const loiAdmissibles: { [key: string]: LoiDebit[] } = {
+    "VanneRectangulaire": [LoiDebit.Cem88d, LoiDebit.Cem88v, LoiDebit.WeirFree, LoiDebit.Cunge80],
+    "SeuilRectangulaire": [LoiDebit.Cem88d, LoiDebit.Cem88v, LoiDebit.Cunge80, LoiDebit.OrificeFree, LoiDebit.OrificeSubmerged]
+}
+
+export function CreateStructure(structureType: StructureType, loiDebit: LoiDebit): Structure {
     switch (structureType) {
-        case StructureType.Cem88d:
+        case StructureType.VanneRectangulaire:
+            var structPrms: RectangularStructureParams = new RectangularStructureParams(
+                0,  // Q
+                100,        // ZDV
+                102,        // Z1
+                101.5,      // Z2
+                2,          // L
+                0.6,        // Cd
+                0.5         // W
+            );
+            if (!(loiDebit in loiAdmissibles["VanneRectangulaire"])) {
+                throw new Error(`la loi de débit ${LoiDebit[loiDebit]} n'est pas admissible pour les vannes rectangulaires`);
+            }
+            break;
+
+        case StructureType.SeuilRectangulaire:
+            structPrms = new RectangularStructureParams(
+                0,  // Q
+                100,        // ZDV
+                102,        // Z1
+                101.5,      // Z2
+                2,          // L
+                0.6        // Cd
+            );
+            if (!(loiDebit in loiAdmissibles["SeuilRectangulaire"])) {
+                throw new Error(`la loi de débit ${LoiDebit[loiDebit]} n'est pas admissible pour les seuils rectangulaires`);
+            }
+            break;
+
+        default:
+            throw new Error(`type de structure ${StructureType[structureType]} non pris en charge`);
+    }
+
+    switch (loiDebit) {
+        case LoiDebit.Cem88d:
             return new StructureCem88d(structPrms);
-        case StructureType.Cem88v:
+
+        case LoiDebit.Cem88v:
             return new StructureCem88v(structPrms);
-        case StructureType.Cunge80:
+
+        case LoiDebit.Cunge80:
             return new StructureCunge80(structPrms);
-        case StructureType.OrificeFree:
+
+        case LoiDebit.OrificeFree:
             return new StructureOrificeFree(structPrms);
-        case StructureType.OrificeSubmerged:
+
+        case LoiDebit.OrificeSubmerged:
             return new StructureOrificeSubmerged(structPrms);
-        case StructureType.WeirFree:
+
+        case LoiDebit.WeirFree:
             const st: StructureWeirFree = new StructureWeirFree(structPrms);
             st.prms.Cd.v = 0.4;
             return st;