Part 1. Floor Description

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1.1 Subgrade / subbase.
Describe the subgrade material, its moisture content when compacted and the degree of compaction. If a subbase was included, describe the material used and its degree of compaction. Also include the subgrade or subbase modulus based on measured values from plate tests or the California Bearing Ratio test, or on estimates from the subbase description or classification. Finally, include an estimate of total and differential settlement if one is available. Much of the information for this section will be found in a soils report provided by the geo-technical specialist for the project.

1.2 Vapor retarder.
If a vapor retarder or vapor barrier was installed, give the type (low- or high-density polyethylene, fiber-reinforced paper or premolded membrane), manufacturer and thickness. Also say whether the vapor retarder or barrier is in contact with the concrete or separated from the concrete by a granular layer. If the latter, give the thickness and composition of the layer.

1.3 Slab thickness.
Give the nominal floor thickness and the variations that should be expected. For example: "Nominal thickness is 5 inches. This means that the average thickness is 5 inches with a standard deviation of ___ inch." Fill in the blank with the floor crews standard deviation based on data from similar floors the crew has placed.

1.4 Concrete mix.
Give the mix proportions, including data on cement type, admixtures and aggregates. Give the nominal maximum size of the coarse aggregate. Also give concrete temperature, slump and air-content ranges.

1.5 Concrete strength.
Give the average concrete compressive strength and the strength range from cylinder tests. Include the age at which the strengths were measured and whether the cylinders were cured in the lab or field.

1.6 Reinforcement.
Include the reinforcing steel amount and location, such as #4 bars spaced at 16 inches in both directions and located 2 inches below the top surface.

1.7 Joint details.
Include details from the project drawings, noting any modifications that were incorporated. Give the depth of sawed joints and the waiting period in hours after floor finishing before the joints were sawed.

1.8 Dates or period of placement.
This can simply be the time period during which the floor was placed (such as July 7-25, 1998), or it can be a sketch of the floor giving the dates each section was cast.

1.9 Method and duration of curing.
Give the typical time interval between completion of finishing and initiation of curing. If a curing compound was used, give the brand name and coverage rate in square feet per gallon (or square meters per liter). If another curing method was used, describe the method and its duration.

1.10 Joint filler.
Indicate which joints were filled, when and how deep. Also give the brand name and manufacturer of the filler.

1.11 Flatness and levelness.
If floors were measured for flatness and levelness, record the measurement method, results and elapsed time after placement at which the measurements were made.

1.12 Other relevant information.
Describe any unique treatments the floor may have received, such as a protective sealer or a dry-shake hardener. Specify where the product was used and the application rate. Also give the brand name and manufacturer of the product. Specifically exclude from the report any elements you are not responsible for installing. For example: "Sump pumps in washout pits and related plumbing accessories are not described in this manual." Design loading information also is of use to the building owner and may protect you from future lawsuits if the floor is subjected to loadings higher than those for which it was designed. Floors may be designed for vehicle-axle loads, uniform loads within aisles, rack and post loads, or column and wall loads. Record these design loads, which can sometimes be found on the drawings or in the general notes for the drawings.

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