Best Practices Magazine - issue nº1 - English

Our experts I Structural Calculation
structure’s parts subject to the corresponding
unweighted actions (nominal loads) is
studied:
• Verifying the overall stability of the
struc-ture.
• Verifying beam deflection
Ultimate Limit State (ULS)
In each of the load cases the tensional
state of components subjected to the corresponding
weighted actions (affected
by factors of security) is studied. In the
verification formulas of the elements the
combination of forces (down-aisle + crossaisle)
must be considered.
Variable actions like weight and actions due to moving loads on
platforms and walkways.
single action, which in turn is the most
relevant (unfavourable).
Accidental actions
- Forklift blows.
- Actions on security profiles.
- Seismic actions.
Load states and the combination
of actions
It is viewed as appropriate and sufficient
to study the two load states listed below,
considering the following actions or load
cases:
• Permanent actions + the most unfavourable
variable action.
• Permanent actions + 0.9 x (the totality
of variable actions).
• Permanent actions + variables + incidentals.
State Service Limit (SSL)
In each of the load cases the buckling of the
It is also necessary to ponder the uncertainty
as to the different actions that can
affect the racking (described previously).
To do this, there are established security
coefficients considered, for both the load
coefficient and the material, and which
can range between 1.0 and 1.5.
Some countries have specific national legislation
which obliges you to use greater
weighting coefficients in the facilities that
are built on its territory (A deviations).
Eccentricities
When the design and/or handling of the
storage system allows the pallets to syste-
Vertical and horizontal actions due to the placement of pallets.
Best Practices
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