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RE: [BUILDINGS] Standards (or Recommendations) for "Flatness" of Commerical Building Slab-On-Grade Floor

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Use Good or similar values recommended by Gary Ehrlich

Matthew Stuart
Structural Dept. - Manalapan
732-577-9889 x1283


-----Original Message-----
From: Bill Polhemus [mailto:bill(--nospam--at)polhemus.cc]
Sent: Wednesday, February 09, 2005 11:16 AM
To: seaint(--nospam--at)seaint.org
Subject: Re: [BUILDINGS] Standards (or Recommendations) for "Flatness" of Commerical Building Slab-On-Grade Floor

Stuart, Matthew wrote:

>Recommended F-Numbers for Various Floor Profile Categories
>[PARA]Floor Profile Category   Random Traffic Floors   Defined Traffic Floors
>       Specified Overall Value Minimum Local Value    
>       FF      FL      FF      FL      Fmin
>Conventional [PARA](using bullfloat)   19      13      13      10      19
>Conventional [PARA](Using highway straightedge)        25      17      13      10      25
>Good   38      25      19      13      38
>Flat   50      33      25      17      50
>Very Flat      75      50      38      25      75
>Superflat      100     66      50      33      100
>Ultraflat      150     100     75      50      150
>
>
>
>      
>Approximate Equivalence of FF Numbers and Straightedge Measurements
>F-Number       Gap Under 10'-0" Straightedge
>12     1/2"
>20     5/16"
>25     1/4"
>32     3/16"
>50     1/8"
>
>
>
>Matthew Stuart
>Structural Dept. - Manalapan
>732-577-9889 x1283
> 
>
Those numbers are good to know. However, what is appropriate? If I were
GUESSING, I would say that a typical light commercial/retail store would
be classified as "Good" according to the numbers you have given.

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