BeginnerTopic 3 of 112Civil & Structural
Load paths
Loads travel from slab to beam to column to foundation to soil.
In depth
Loads must travel continuously to the ground: slab → beam → girder → column → foundation → soil. Understanding the load path identifies critical members and ensures no weak link. Removing or interrupting an element (as in progressive collapse) redistributes load.
Key points
- Tributary widths
- Gravity vs lateral load paths
- Redundancy gives alternate paths
ExampleA floor load on a beam splits to its two supporting columns as reactions.
A load path shows how weight reaches the ground, and a broken link anywhere can cause collapse, so engineers trace it deliberately.
What is Load paths?
Loads travel from slab to beam to column to foundation to soil.
Why is it important to understand load paths?
A load path shows how weight reaches the ground, and a broken link anywhere can cause collapse, so engineers trace it deliberately.
What is a load path?
The route loads take through the structure from where they are applied to the ground, through slabs, beams, columns, walls and foundations.
What happens if a link in the load path is missing?
Loads can redistribute to other members or cause local failure, which is why robustness and continuity of the path matter.
How is Load paths used in practice?
Typical applications include following the load of a roof down to the foundations of a house, checking that a transfer beam carries a column above a shop front and identifying the weak link when a floor sags unexpectedly.
What should I learn before Load paths?
Study "Building loads" first (topic 2 of 112 in Civil & Structural). It covers the groundwork this topic builds on.
What are the key points of Load paths?
Tributary widths. Gravity vs lateral load paths. Redundancy gives alternate paths.
Can you give an example of Load paths?
A floor load on a beam splits to its two supporting columns as reactions.
What comes after Load paths?
The next topic is "Structural elements", which builds directly on this one.
How difficult is Load paths?
It is classed as Beginner in Civil & Structural (topic 3 of 112). It is an entry-level topic. It relies only on basic school mathematics and the ideas introduced earlier in this discipline.