Siteworks & Preparation
Site preparation / guidelines for Redpath shelters
An important part of building an effective + clean and dry running deep litter, limerock floor or concrete based Redpath shelter is the initial site works and the locating of the shelter itself.
Generally it is best to locate the building on a raised area of land and not a low lying part of the farm. If in doubt it may be worth considering an option of creating raised platform of clay / rock for the building and its surrounds.
Ideally the site will be prepared well in advance of the planned construction date; this is to allow the site to settle and "firm-up". Also an early site preparation plan may allow the site to re-grow a light grass cover which will reduce the likelihood of the site degrading into a muddy unworkable area that may become difficult or unsafe to operate a construction crews.
The prepared site should be made 'oversize" to provide a minimum of 8 metres at each end and 4 metres along each side of the proposed building size. This guideline will also provide straight-forward access for machinery and turning areas at the ends for both the builders and the farm working + equipment.
Site slope or "falls" will typically have two options (see below). Sites that are located on peaty soils, loose sand or pumice or with high water tables may require special consideration when it comes to the sites preparation work, In these cases please contact Redpath for further details and recommendations before proceeding.
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FOR LENGTHWAYS SITE FALL:
Prepare the site to the recommended falls as per the Redpath site-plan that is supplied with every building; this would typically be 7.3mm - 10mm per metre along the length of the building. This site set up will mean that the pole heights will remain constant along the full length of the building.
Example: A 60m length building with a fall of 7.3mm per metre will have 438mm of 'fall" or "slope" from one end to the other end. This ground "fall" or "slope" will effectively be "parallel" to the buildings gutters. Choose the end that you wish the storm water and waste-water to travel to before starting!
If proposing to use the deep litter style floor system - then setting the building on a raised piece of ground becomes more important so as to promote kept dry and healthy woodchip/litter. The drains beneath the deep litter are set into the raised pad section and would usually have large rock surrounding them with a further thin layer of scoria/gravel across the entire site. (See flooring systems page)
NOTE: The drains below the litter - will also follow the same fall as above 'end-to-end".
Occasionally the building site will be mostly level - and the 'fall' for the gutter / rain water run-off will need to be introduced by progressively reducing pole height from one end to the other. Example on a 60m length building the pole height might be 3.5m at one end, but will reduce by 7.3mm per metre to the far end leaving a pole height of 3.062m. NOTE: keep in mind the required clearance issues for machinery if you plan to build on a level site in this manner! In this situation it is often a popular option to choose a slight taller overall pole height for the shelter 4m or 4.5m.
Another option on a near to level site is to fall the building to both ends (two directions), so that the maximum pole height would be in the centre of the building and rainwater will be gathered at both ends of the building.
Note: In all cases - please do not hesitate to contact Redpath for guidelines and some typical site elevation drawings before proceeding with your build project. Redpath can often supply these guidelines for no initial cost.
WIDTHWAYS or CROSSWAYS LEVELS:
Across the width of the building the site will typically be level (excepting some 'hump & hollow' formations for drains. If this is not possible - then please check with Redpath for recommendations on site works before beginning any work. Redpath structures are quite compliant to sites that have falls in multiple directions - however consideration will always need to be made for storm water run-off and overhead heights for access to the building.
OTHER CONSIDERATIONS FOR SITE PREPARATION:
Avoid any potential excavation near to the proposed pole-lines / foundations of the building, and avoid placing any drains or infrastructure in place before the building is constructed. This is important as the foundations should not be undermined or ground compactness compromised prior to construction.
Avoid very soft soils if possible - as their holding capacity for foundations can sometimes be poor. It is possible to use alternative footing designs if this situation is unavoidable though.
Keep in mind other infrastructure needs, race level entry and exit points, turnaround areas, water supply and the future location of water troughs and any electrical requirements.
The site will most likely be located central to the farms infrastructure, near to the milking shed, feed bunkers, power and water supplies etc.
If you plan to add fill to the proposed site to "introduce the fall required" then you will need to ensure that this fill is stable and compacted. Any fill that is not stable will cause difficulties for the building process when the foundation holes are being drilled + also the fill is not likely to be considered to be "solid ground" and the foundation holes may require to be drilled deeper. This may require more concrete and greater expense may be incurred.
If in doubt - Free Ph 1 800 024 680 - for detailed information and drawingsEnquire now