Drawing the grid

Modelling of simple or multi-span slab or girder decks is a breeze with the grillage wizard.

Skew angles and plan curvature, no problem.

Use the flexible drawing tools of Modeller for anything out of the ordinary.

Short term, long term and construction analyses

Bridge deck (grillage) material attributes allow you to designate materials for girders and bracing, slab and reinforcement.

Use long term and short term properties for concrete as needed with the intuitive multiple analysis facility.

Choose when to include the slab stiffness and mass with a simple tick box.

Grillage section properties

Solid, voided, multicellular or infill slabs; steel I-girders, tub girders, concrete girders or U-beams and shear key decks - just define the deck dimensions from simple parameters and let LUSAS calculate all the section properties to industry-standard texts

Modular ratios, cracked and uncracked sections and shear lag are handled elegantly.

Transverse bracing sections are covered with a frame analysis running silently as proposed by Hambly and conforming with NCHRP Report 725.

Deck temperature and live loads

Determine the through-deck temperature profile to your local code of practice; LUSAS will calculate the in-plane, moment and warping components, and apply the moment part to your grillage.