diff --git a/poincare/include/poincare/ceiling.h b/poincare/include/poincare/ceiling.h
index 22e32d06a..a5f865abc 100644
--- a/poincare/include/poincare/ceiling.h
+++ b/poincare/include/poincare/ceiling.h
@@ -19,6 +19,7 @@ private:
     return templatedComputeComplex(c);
   }
   template<typename T> Complex<T> templatedComputeComplex(const Complex<T> c) const;
+  ExpressionLayout * privateCreateLayout(FloatDisplayMode floatDisplayMode, ComplexFormat complexFormat) const override;
 };
 
 }
diff --git a/poincare/include/poincare/floor.h b/poincare/include/poincare/floor.h
index dda7ebeac..0ecbf9f6d 100644
--- a/poincare/include/poincare/floor.h
+++ b/poincare/include/poincare/floor.h
@@ -19,6 +19,7 @@ private:
     return templatedComputeComplex(c);
   }
   template<typename T> Complex<T> templatedComputeComplex(const Complex<T> c) const;
+  ExpressionLayout * privateCreateLayout(FloatDisplayMode floatDisplayMode, ComplexFormat complexFormat) const override;
 };
 
 }
diff --git a/poincare/src/ceiling.cpp b/poincare/src/ceiling.cpp
index 885a61c21..b77508094 100644
--- a/poincare/src/ceiling.cpp
+++ b/poincare/src/ceiling.cpp
@@ -1,4 +1,5 @@
 #include <poincare/ceiling.h>
+#include "layout/ceiling_layout.h"
 
 extern "C" {
 #include <assert.h>
@@ -32,6 +33,10 @@ Complex<T> Ceiling::templatedComputeComplex(const Complex<T> c) const {
   return Complex<T>::Float(std::ceil(c.a()));
 }
 
+ExpressionLayout * Ceiling::privateCreateLayout(FloatDisplayMode floatDisplayMode, ComplexFormat complexFormat) const {
+  assert(floatDisplayMode != FloatDisplayMode::Default);
+  assert(complexFormat != ComplexFormat::Default);
+  return new CeilingLayout(m_args[0]->createLayout(floatDisplayMode, complexFormat));
 }
 
-
+}
diff --git a/poincare/src/floor.cpp b/poincare/src/floor.cpp
index f0378e74a..b82b247e5 100644
--- a/poincare/src/floor.cpp
+++ b/poincare/src/floor.cpp
@@ -1,4 +1,5 @@
 #include <poincare/floor.h>
+#include "layout/floor_layout.h"
 
 extern "C" {
 #include <assert.h>
@@ -32,6 +33,10 @@ Complex<T> Floor::templatedComputeComplex(const Complex<T> c) const {
   return Complex<T>::Float(std::floor(c.a()));
 }
 
+ExpressionLayout * Floor::privateCreateLayout(FloatDisplayMode floatDisplayMode, ComplexFormat complexFormat) const {
+  assert(floatDisplayMode != FloatDisplayMode::Default);
+  assert(complexFormat != ComplexFormat::Default);
+  return new FloorLayout(m_args[0]->createLayout(floatDisplayMode, complexFormat));
 }
 
-
+}
diff --git a/poincare/src/layout/bracket_layout.cpp b/poincare/src/layout/bracket_layout.cpp
index 3f8d3620d..ab94719cf 100644
--- a/poincare/src/layout/bracket_layout.cpp
+++ b/poincare/src/layout/bracket_layout.cpp
@@ -19,17 +19,22 @@ BracketLayout::~BracketLayout() {
 }
 
 void BracketLayout::render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) {
+  const KDCoordinate k_widthMargin = widthMargin();
   KDSize operandSize = m_operandLayout->size();
   ctx->fillRect(KDRect(p.x(), p.y(), k_lineThickness, m_operandLayout->size().height()), expressionColor);
   ctx->fillRect(KDRect(p.x()+operandSize.width()+2*k_widthMargin+k_lineThickness, p.y(), k_lineThickness, m_operandLayout->size().height()), expressionColor);
-  ctx->fillRect(KDRect(p.x(), p.y(), k_bracketWidth, k_lineThickness), expressionColor);
-  ctx->fillRect(KDRect(p.x()+k_lineThickness+operandSize.width()+2*k_widthMargin-k_bracketWidth, p.y(), k_bracketWidth, k_lineThickness), expressionColor);
-  ctx->fillRect(KDRect(p.x(), p.y()+operandSize.height()-k_lineThickness, k_bracketWidth, k_lineThickness), expressionColor);
-  ctx->fillRect(KDRect(p.x()+k_lineThickness+operandSize.width()+2*k_widthMargin-k_bracketWidth, p.y()+operandSize.height()-k_lineThickness, k_bracketWidth, k_lineThickness), expressionColor);
-
+  if (renderTopBar()) {
+    ctx->fillRect(KDRect(p.x(), p.y(), k_bracketWidth, k_lineThickness), expressionColor);
+    ctx->fillRect(KDRect(p.x()+k_lineThickness+operandSize.width()+2*k_widthMargin-k_bracketWidth, p.y(), k_bracketWidth, k_lineThickness), expressionColor);
+  }
+  if (renderBottomBar()) {
+    ctx->fillRect(KDRect(p.x(), p.y()+operandSize.height()-k_lineThickness, k_bracketWidth, k_lineThickness), expressionColor);
+    ctx->fillRect(KDRect(p.x()+k_lineThickness+operandSize.width()+2*k_widthMargin-k_bracketWidth, p.y()+operandSize.height()-k_lineThickness, k_bracketWidth, k_lineThickness), expressionColor);
+  }
 }
 
 KDSize BracketLayout::computeSize() {
+  const KDCoordinate k_widthMargin = widthMargin();
   KDSize operandSize = m_operandLayout->size();
   return KDSize(operandSize.width() + 2*k_widthMargin + 2*k_lineThickness, operandSize.height());
 }
@@ -42,8 +47,8 @@ ExpressionLayout * BracketLayout::child(uint16_t index) {
 }
 
 KDPoint BracketLayout::positionOfChild(ExpressionLayout * child) {
+  const KDCoordinate k_widthMargin = widthMargin();
   return KDPoint(k_widthMargin+k_lineThickness, 0);
 }
 
 }
-
diff --git a/poincare/src/layout/bracket_layout.h b/poincare/src/layout/bracket_layout.h
index 095ca82d2..4fca30e92 100644
--- a/poincare/src/layout/bracket_layout.h
+++ b/poincare/src/layout/bracket_layout.h
@@ -15,13 +15,15 @@ public:
   BracketLayout& operator=(const BracketLayout& other) = delete;
   BracketLayout& operator=(BracketLayout&& other) = delete;
 protected:
+  virtual KDCoordinate widthMargin() const { return 5; }
+  virtual bool renderTopBar() const { return true; }
+  virtual bool renderBottomBar() const { return true; }
   void render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) override;
   KDSize computeSize() override;
   ExpressionLayout * child(uint16_t index) override;
   KDPoint positionOfChild(ExpressionLayout * child) override;
 private:
   constexpr static KDCoordinate k_bracketWidth = 5;
-  constexpr static KDCoordinate k_widthMargin = 5;
   constexpr static KDCoordinate k_lineThickness = 1;
   ExpressionLayout * m_operandLayout;
 };
diff --git a/poincare/src/layout/ceiling_layout.h b/poincare/src/layout/ceiling_layout.h
new file mode 100644
index 000000000..6fe8d60a8
--- /dev/null
+++ b/poincare/src/layout/ceiling_layout.h
@@ -0,0 +1,22 @@
+#ifndef POINCARE_CEILING_LAYOUT_H
+#define POINCARE_CEILING_LAYOUT_H
+
+#include "bracket_layout.h"
+
+namespace Poincare {
+
+class CeilingLayout : public BracketLayout {
+public:
+  CeilingLayout(ExpressionLayout * operandLayout) : BracketLayout(operandLayout) {}
+  ~CeilingLayout() {}
+  CeilingLayout(const CeilingLayout& other) = delete;
+  CeilingLayout(CeilingLayout&& other) = delete;
+  CeilingLayout& operator=(const CeilingLayout& other) = delete;
+  CeilingLayout& operator=(CeilingLayout&& other) = delete;
+protected:
+  bool renderBottomBar() const override { return false; }
+};
+
+}
+
+#endif
diff --git a/poincare/src/layout/floor_layout.h b/poincare/src/layout/floor_layout.h
new file mode 100644
index 000000000..17c994eb5
--- /dev/null
+++ b/poincare/src/layout/floor_layout.h
@@ -0,0 +1,22 @@
+#ifndef POINCARE_FLOOR_LAYOUT_H
+#define POINCARE_FLOOR_LAYOUT_H
+
+#include "bracket_layout.h"
+
+namespace Poincare {
+
+class FloorLayout : public BracketLayout {
+public:
+  FloorLayout(ExpressionLayout * operandLayout) : BracketLayout(operandLayout) {}
+  ~FloorLayout() {}
+  FloorLayout(const FloorLayout& other) = delete;
+  FloorLayout(FloorLayout&& other) = delete;
+  FloorLayout& operator=(const FloorLayout& other) = delete;
+  FloorLayout& operator=(FloorLayout&& other) = delete;
+protected:
+  bool renderTopBar() const override { return false; }
+};
+
+}
+
+#endif