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RE: Slab floor damage

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Water has more than likely migrated under slab…and with top surface of slab exposed to conditioned space curling of the slab can occur (top surface is dryer than recently wet bottom and therefore shrinks relative to bottom causing curling of slab).

 

As water/moisture under slab recedes and subgrade dries out, curling will dissipate.

 

D. Matthew Stuart, P.E., S.E., F.ASCE, SECB

Senior Project Manager

Structural Department

Associate

Schoor DePalma Engineers and Consultants

200 State Highway Nine

Manalapan, NJ 07726

732-577-9000 (Ext. 1283)

908-309-8657 (Cell)

732-298-9441 (Fax)

mstuart(--nospam--at)schoordepalma.com

 

-----Original Message-----
From: ENGRLAINES(--nospam--at)aol.com [mailto:ENGRLAINES(--nospam--at)aol.com]
Sent:
Thursday, June 22, 2006 4:06 PM
To: seaint(--nospam--at)seaint.org
Subject: Slab floor damage

 

40-year old single story house w/ 4" slab-on-grade foundation/floor, most likely cut and fill pad, water seepage in nearby street but not under house, trees in side yards. Floor tiles cracked (tight cracks) and buckled approximately 1-inch high near the edge of the floor (but not at the edge) in a 5-foot line perpendicular to cut/fill line and to base of slope. No damage to plaster walls, ceilings. Moderate temperatures (Los Angeles). No recent shaking (construction, earthquakes). Wha’s up?

Charles Laine, S.E.

Long Beach, CA