> ## Documentation Index
> Fetch the complete documentation index at: https://docs.realtimelca.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Constructions

> Reusable build-ups composed of several materials.

A **construction** in Real-Time LCA is a multi-layer build-up — for example, an external wall, a HEB column, or a wood I-joist — composed of two or more materials with thicknesses, quantities, and shared metadata. Constructions let you map a model element to a whole assembly rather than picking each layer manually every time.

## In this section

<Card title="Browse constructions" icon="magnifying-glass" href="/user-guide/library/constructions/browse-constructions">
  View the constructions list and inspect the layers and indicator values of a construction.
</Card>