Field Dimensions Guide

Recommended Infield Soil Specs

Professional Level

This level of field will always have access to water and be maintained on a regular or daily basis, often with crew of several people. Examples of these type fields include professional ballparks (MLB, MiLB) and Division 1 colleges and universities

Sand: Total content 58% to 62%. 38% to 45% of the total sand content shall be composed of medium, coarse and very coarse sand particles. Sand shape should be sub-angular to sub-rounded with low to medium sphericity.

Silt & Clay: The combined amount of silt and clay shall be between 38% and 42%. The silt-to-clay ratio (SCR), which is found by dividing the percent silt by the percent clay, shall be between 0.5 and 1.0.

Intermediate Level

This level of field will always have access to water and be maintained on a somewhat limited basis by usually one person or maybe the team who uses the field. Examples of these type fields include colleges and universities, some high schools or sports complexes.

Sand: Total content 65% to 69%. Of the total sand content, 45% to 50% shall be composed of medium, coarse, and very coarse sand particles. Sand shape should be sub-angular to sub-rounded with low to medium sphericity.

Silt & Clay: The combined amount of silt and clay shall be between 31% and 35%. The silt-to-clay ratio (SCR), which is found by dividing the percent silt by the percent clay, shall be between 0.5 and 1.0.

Recreational Level

This level of field typically will not have access to water and is maintained on a volunteer or irregular basis. Examples of these type fields include most school and park fields.

Sand: Total content 70% to 75%. >50% of the total sand content shall be composed of medium, coarse and very coarse sand particles. Sand shape should be sub-angular to sub-rounded with low to medium sphericity.

Silt & Clay: The combined amount of silt and clay shall be between 30% and 25%. The silt-to-clay ratio (SCR), which is achieved by dividing the percent silt by the percent clay, shall be between 0.5 and 1.0.


To ensure the quality of a supplied infield soil, a sample of the material produced for you should be sent to a soil testing lab of your choice. If the project is one that requires a large volume of infield soil, then a soil test should be conducted at the rate of one per 200 tons of material delivered to the job site. All testing should be performed by the same soil testing agency. Test results should be compared to and successfully fall into the range provided in these Infield Soil Specifications.

No particles in the infield mix shall exceed 3 millimeters in size and no more than 5% of particles shall be retained on the 2 millimeter screen.