Browse Forums Landscape & Garden Design 1 Sep 11, 2016 9:40 pm Now I will start out saying that I am a complete novice when it comes to anything landscape and have been doing research in regards to building a retaining wall. However how do you know how high the wall needs to be? Any help muchly appreciated. Here is a photo of the area to be retained. Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ sekisui build viewtopic.php?f=31&t=75060&p=1573965#p1573965 Building a sekisui house in Holmesville NSW viewtopic.php?f=31&t=75060 Re: Future retaining wall 3Sep 13, 2016 2:07 pm Step 1 - Work out the height of the main part of your backyard (right side of the picture) compared to the base of the side fence. Easy to do with either a string line and spirit level or a laser level device. Mark the spot on the fence and then measure vertically to the ground - that's your retaining height, although it is usually a good idea to have a slight batter (slope) down to the retaining wall to assist with water runoff to the drains that you put behind the retaining wall. This could reduce the wall height slightly. The height also determines if exempt, complying or full DA development is required and if engineering design is required. Step 2: How far in from the fence do you want the wall? Depending on which state you are in there are restrictions on the wall height depending on how far from the site boundary it is for exempt development, otherwise you may need to go to complying or a full DA. Provide this info and then we could help further. Re: Future retaining wall 4Nov 28, 2016 5:40 pm bg100 Step 1 - Work out the height of the main part of your backyard (right side of the picture) compared to the base of the side fence. Easy to do with either a string line and spirit level or a laser level device. Mark the spot on the fence and then measure vertically to the ground - that's your retaining height, although it is usually a good idea to have a slight batter (slope) down to the retaining wall to assist with water runoff to the drains that you put behind the retaining wall. This could reduce the wall height slightly. The height also determines if exempt, complying or full DA development is required and if engineering design is required. Step 2: How far in from the fence do you want the wall? Depending on which state you are in there are restrictions on the wall height depending on how far from the site boundary it is for exempt development, otherwise you may need to go to complying or a full DA. Provide this info and then we could help further. https://dpe-files-prod1.s3-ap-southeast ... _walls.pdf just wonder, if it is for a backyard for a residential site, the limit of the height of the wall is 1M or 600mm? if under 600mm, can it be build by the owner itself? What are the standards for complying development? Earthworks and structural supports that exceed 600mm above or below existing ground level may be approved by a private certifier as complying development. Standards for complying development ensure that any earthworks or structural supports: • must not be located over a registered easement. • within 1m of a side or rear boundary must not exceed more than 1m in height, and must not exceed 3m in height in any other location. • more than 600mm above or below ground level are contained by a structural support. • undertaken on acid sulfate soils, must not exceed more than 1m. Additional requirements for complying development in residential areas Earthworks and structural supports have the potential to cause damage to properties and additional standards will apply when undertaking works which exceed the exempt development restrictions. In residential areas, retaining walls and other forms of structural support may also require certification by a professional engineer if: • more than 600mm above or below existing ground level and within 1m of a lot boundary, or • more than 1m above or below existing ground level in any other location If works are within 40m of a natural water body, the maximum depth of excavation is limited to 1m. Thank you again Simeon.. I will call my certifier for that. Have a good day 4 5193 Scientists have used random matrix theory to demonstrate theoretically that the neutrino mass hierarchy can be explained mathematically. When a substance is fragmented… 21 20659 Thanks for the insights, that makes perfect sense, and yeah, I will be leaning on the experience of the excavator operator entirely. 6 16149 |