diff --git a/app/src/pages/PiperackModule.tsx b/app/src/pages/PiperackModule.tsx
index 400a7db..e2471fc 100644
--- a/app/src/pages/PiperackModule.tsx
+++ b/app/src/pages/PiperackModule.tsx
@@ -17,7 +17,7 @@ const PiperackModule: React.FC = () => {
   const [width, setWidth] = useState(6);
   const [height, setHeight] = useState(2.5);
   const [elevation, setElevation] = useState(8);
-  const [spacing, setSpacing] = useState(6);
+  const [spacing, setSpacing] = useState(3);
   const [numFrames, setNumFrames] = useState(3);
   const [phiStruct, setPhiStruct] = useState(0.2);
   const [pipes, setPipes] = useState<PipeDef[]>([]);
@@ -161,14 +161,14 @@ const PiperackModule: React.FC = () => {
                       <span className="text-sm font-medium">Largura (b)</span>
                       <span className="text-sm text-muted-foreground">{width} m</span>
                     </div>
-                    <Slider value={[width]} min={2} max={15} step={0.5} onValueChange={v => setWidth(v[0])} />
+                    <Slider value={[width]} min={2} max={25} step={0.5} onValueChange={v => setWidth(v[0])} />
                   </div>
                   <div className="space-y-2">
                     <div className="flex justify-between">
                       <span className="text-sm font-medium">Altura do pórtico (h)</span>
                       <span className="text-sm text-muted-foreground">{height} m</span>
                     </div>
-                    <Slider value={[height]} min={1} max={5} step={0.1} onValueChange={v => setHeight(v[0])} />
+                    <Slider value={[height]} min={0.5} max={5} step={0.1} onValueChange={v => setHeight(v[0])} />
                   </div>
                   <div className="space-y-2">
                     <div className="flex justify-between">
@@ -182,14 +182,14 @@ const PiperackModule: React.FC = () => {
                       <span className="text-sm font-medium">Espaçamento (e)</span>
                       <span className="text-sm text-muted-foreground">{spacing} m</span>
                     </div>
-                    <Slider value={[spacing]} min={2} max={12} step={0.5} onValueChange={v => setSpacing(v[0])} />
+                    <Slider value={[spacing]} min={0.5} max={5} step={0.5} onValueChange={v => setSpacing(v[0])} />
                   </div>
                   <div className="space-y-2">
                     <div className="flex justify-between">
                       <span className="text-sm font-medium">Número de Pórticos (n)</span>
                       <span className="text-sm text-muted-foreground">{numFrames}</span>
                     </div>
-                    <Slider value={[numFrames]} min={1} max={10} step={1} onValueChange={v => setNumFrames(v[0])} />
+                    <Slider value={[numFrames]} min={1} max={5} step={1} onValueChange={v => setNumFrames(v[0])} />
                   </div>
                   <div className="space-y-2">
                     <div className="flex justify-between">