T153 load-bearing trapezoidal sheet - high-rib trapezoidal sheet

The T153 Trapezoidal Plate is the heavy-duty, steel, load-bearing building construction element in the Zensteel range.

Zensteel T153 High Rib Trapezoidal Sheet is a heavy-duty, reinforced structural sheet typically used for industrial and agricultural halls, warehouses, stadiums, and large span roofs and slabs.

T153 trapezoidal sheet - structural role and application

High-frame trapezoidal sheets are the main or secondary load-bearing elements of roof and slab structures, supported on beams, trusses or frames. The plates are connected longitudinally and laterally by overlapping, with bolts or rivets per side and with a minimum of 200 mm spacing in the longitudinal direction.

Available finishes: natural galvanized, PE painted interior (Ral 9002 or 9010)

Static model

• The T153 high-braced trapezoidal plates act statically as beam supports.
• The model can be double or multi-post
• The burden is mostly evenly distributed.
• The span and run-out dimensions are adapted to the structural system and are used as a basis for sizing.
• Other construction software is recommended for more complex models (e.g. different spacing, variable stiffness, unequal loads)

Material and design

• T153 trapezoidal plates are made of cold-rolled galvanized steel, typically in material grade S350GD
• The design thickness is given net of the anchor coating, the effective cross-section is taken into account in the structural calculations.
• The galvanized coating provides corrosion protection, but does not increase the load capacity in static calculations.

Load capacity and sizing

• The load tests are carried out in accordance with Eurocode 3 (EN 1993-1-3), a standard for thin-walled cold-formed structures.
• Investigated failure modes of trapezoidal plates:
  • bending failure (torque resistance),
  • spine shear (shear resistance),
  • spinal burst (local denting due to reaction forces),
  • torque-shear and torque-reaction force interaction.

(Permissible loads differ for positive/negative placement and compressive/suction loads )

Limiting state of use

• The T153 high rib slab must also meet stiffness and walkability requirements.
• The degree of deflection (e.g. L/200, L/300 limits) is limited by standard serviceability specifications.

Load bearing trapezoidal sheet - design aids

The design table includes:

• cross-sectional characteristics,
• resistance values,
• permissible loads

different support models.

The tables allow you to quickly select the right type of plate based on the span and load required.