LYSAGHT W-DEK®

Product Description and Features

LYSAGHT W-DEK® is one of a range of structural steel decking products available from BlueScope Lysaght.  It is an economical steel decking system which has been optimised to bring greater efficiency, speed of construction and economy. 

• One of the widest steel deck profiles currently available (700mm) in Australia
• Superior spanning capacity reduces propping requirements (4m plus unpropped spans)
• Excellent concrete displacement characteristics - reduces up to 40mm concrete over conventional concrete slabs
• Improved on-site safety with less propping, no stripping and minimal on-site cutting
• Can be used as permanent formwork or used to reduce bottom reinforcing
• Fast track construction, reduced time from floor to floor
• Safe working platform with wide flat ribs
• Soffit aesthetics with no or minimal deformations from prop marking

Warnings

• Design & detailing should be carried out by a qualified structural engineer

Product Details

Specification

Specification

LYSAGHT W-DEK® is roll-formed from hot dipped, zinc coated high tensile steels, which conform to AS1397 grade G550, Z350.

1.2mm BMT, Grade G500, is not available in the design tables and software, however, the solution using LYSAGHT W-DEK® 1.2mm BMT is available subject to enquiry.

Physical Properties

Thickness (mm)	Mass		Yield Strength MPa	Coverage m2/t
	kg/m2	kg/m
0.75 1.00	8.85 11.63	6.19 8.14	550 550	113 86

Schematic

Availability

Availability

NSW/ ACT	VIC	TAS	QLD	NT	SA	WA
Avail.	Avail.	Avail.	Avail.	By Enquiry*	Avail.	Avail.

*Please contact our sales office on 13 30 38 for availability.

 

Design

Formwork Construction and Quick Selection Tables

This information is to be used in conjunction with the LYSAGHT W-DEK® Design Manual. Download LYSAGHT W-DEK® Design and Construction Manual (912 KB)

Formwork table 0.75 BMT

No temporary props per slab span

Slab thickness (mm)	130	135	140	145	150	160	175	200
Single Span	2700	2650	2600	2550	2550	2450	2300	2100
Two Spans	3500	3450	3400	3350	3300	3200	3050	2900
Three or more spans	3300	3250	3200	3150	3100	3050	2950	2800

1 temporary prop per slab span

Slab thickness (mm)	130	135	140	145	150	160	175	200
Single Span	5200	5200	5400	5600	5600	6000	5950	5650
Two Spans	5200	5200	5400	5600	5600	6000	5950	5650
Three or more spans	5200	5200	5400	5600	5600	6000	5950	5650

Formwork table 1.00 BMT

No temporary props per slab span

Slab thickness (mm)	130	135	140	145	150	160	175	200
Single Span	3100	3050	3000	2950	2900	2850	2750	2600
Two Spans	4100	4050	4000	3950	3900	3800	3650	3500
Three or more spans	3800	3750	3700	3650	3600	3500	3400	3200

1 temporary prop per slab span

Slab thickness (mm)	130	135	140	145	150	160	175	200
Single Span	5200	5200	5400	5600	5600	6000	6000	6000
Two Spans	5200	5200	5400	5600	5600	6000	6000	6000
Three or more spans	5200	5200	5400	5600	5600	6000	6000	6000

Span Table Notes:

• Continuous maximum slab spans are limited as given in the LYAGHT W-DEK® Design & Construction manual for interior spans and total 6000mm limit.
• Maximum formwork spans are based on L^l/240 deflection limit and ratio of two adjacent spans equal 1:1 and 100mm width of support.
• Use LYSAGHT W 2004 software to get longer spans with L^l/130 deflection limit and wider supports.
• These tables can be used in steel frame construction or other buildings where sheets can be securely fixed to supports.
• The tables are based on the following maximum construction loads:
  • Workmen and equipment = 100kg/m²
  • Mounting of concrete = 3kPa over an area of 1.6x1.6m and zero over the remainder.
  • Stacking of material on LYSAGHT W-DEK® sheets before placement of concrete only = 100kg/m² which should be on drawings and controlled on construction site.
• The information contained in the publication is intended for guidance on only. This information to be used only in conjunction with a consulting structural engineer.

Refer to LYSAGHT W-DEK® Design Manual for full note specifications.

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