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RE: Proprietary concrete slab forming system?

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Sounds like concrete on metal lath (the predecessor to metal decks)…


The “cardboard” was probably there just to catch what went thru the lath…




It was pretty common in the early days of bar joists c. 1930.


David L. Fisher, SE, PE


Head of Design and Construction


Cape Cod Grand Cayman Holdings Ltd.

75 Fort Street

Georgetown, Grand Cayman

British West Indies


-----Original Message-----
From: Stuart, Matthew [mailto:mStuart(--nospam--at)]
Sent: Tuesday, September 30, 2003 11:39 AM
To: 'seaint(--nospam--at)'
Subject: Proprietary concrete slab forming system?


Came across a formed, framed slab system supported by bar joisted spaced at about 2’-0” o.c. that I have not seen before.


Visually, the slab soffit looks very similar to the bottom of a wet cardboard box with a slight shadowing of  2” x 2” ± mesh behind. Slab soffit is hard to the touch. Slab thickness measures 4” thick, concrete.


Anybody seen this system before or am I just looking at a non-descript, removable forming system that just happened to be separated from the concrete via a layer of cardboard?


D. Matthew Stuart, P.E., S.E., P.Eng.

Senior Project Manager

Schoor DePalma Engineers and Consultants

Structural Department

200 State Highway Nine

Manalapan, NJ 07726

732-577-9000 (Ext. 1275)

908-309-8657 (Cell)

732 -431-9428 (Fax)