12/12/2025
an architectural and construction detail illustrating the Formwork (or mold) for casting a reinforced concrete Column or a horizontal beam that will be supported by columns.
Here is a detailed breakdown of the components shown:
📐 FORMWORK COMPONENTS
Formwork is the temporary structure used to contain and shape wet concrete until it gains sufficient strength.
• Side Panels: The vertical wooden boards that form the sides of the mold and define the width and depth of the concrete column/beam.
• Bottom Panel (2"/2.5"): The horizontal wooden board that forms the base of the mold. The dimension given refers to its likely thickness (2 or 2.5 inches).
• Vertical Supports (Lugs): Short wooden pieces nailed horizontally to the side panels to hold them in place and prevent outward bulging when the concrete is poured.
🪵 SHORING AND SUPPORT SYSTEM
This system is crucial for holding the heavy, wet concrete formwork level and stable until the concrete cures.
• Upright Post: The main vertical timbers supporting the formwork.
• Brace: Horizontal or near-horizontal members that connect the upright posts to the formwork bottom panel, adding stability.
• Crosspiece (or Ledger/Sill): A horizontal timber connecting the tops of the upright posts.
• Diagonal Brace: Timbers running diagonally between the upright posts and the ground or lower supports. These provide lateral stability, preventing the entire structure from swaying or collapsing sideways.
• Pie Derecho ("Right Foot" or Vertical Post): This Spanish term labels one of the main vertical support posts.
• Support Prop: A horizontal timber element at the base of the diagonal brace, distributing the load into the ground.
• Cradle/Wedge: Small wooden blocks placed under the upright posts or support props to level the structure and prevent the posts from sinking into soft ground.
🔩 CONCRETE REINFORCEMENT (REBAR)
This is the steel cage placed inside the formwork *before* the concrete is poured. It provides the tensile strength that concrete lacks.
• Reinforcement 3db ø 12mm: This refers to the main longitudinal reinforcing bars (rebar).
• 3db means 3 bars (or perhaps 3 pairs of bars in the cross-section shown).
• ø 12mm is the diameter of these bars (12mm). These bars carry the primary structural forces (tension and compression).
• Hanger Bars 2db ø 10mm: Smaller diameter bars, often placed at the top corners of a beam to hold the stirrups in place or resist minor forces.
• Stirrups/Ties (Implicit): The square or rectangular loops of steel wrapped around the main longitudinal bars. While not explicitly labeled with their own arrow, the square shape visible in the cross-section represents the stirrups, which resist shear forces and confine the main bars.
🚧 CONCRETE AND SCALE
• Concrete: The grey material being poured into the formwork, with a cut-away view showing the reinforcement cage embedded within.
• Red Silhouette: A human figure wearing a hard hat is included for scale reference, indicating the substantial height of the formwork structure.
In summary, the photo details the complete temporary setup required to cast a structural concrete element, including the mold (formwork), the support system (shoring), and the internal steel skeleton (reinforcement).
