The maximum span for 2x6 rafters in residential roof construction is typically around 9 feet.
The maximum pergola span achievable with the available construction materials is typically around 20 feet.
The maximum span for a 2x6 joist in a residential deck construction project is typically around 9 feet.
The maximum allowable span for 2x6 joists in a deck construction project is typically around 9 feet.
The short answer... excavation gets you to grade, over-excavation gets you below grade and is based on engineering requirements. The longer answer... In grading work there may be times when plans specify to cut or excavate to a particular elevation. There are other times when an over-excavation will be specified to remove unsuitable soils to a certain depth. So lets say that you are at a site where the native elevation is at 460' and plans call for finished grade at an elevation of 450' with an over-excavation of 5.' What this means is that you would excavate down 10' (from 460' to 450') and then over-excavate down an additional 5' (from 450' to 445') At that point the bottom of the over-excavated location will usually have x number of inches to be scarified, moisture conditioned and compacted to a certain percentage of the maximum dry density obtained in laboratory testing. The removed soil (aka: over-ex or OX) will then be replaced with suitable material in lifts of a specified thickness with an optimum moisture content and compacted to a particular percentage of the maximum dry density.
The maximum span length for 2x6 joists in a residential deck construction project is typically around 9 feet.
The maximum allowable span for 2x6 floor joists in a residential construction project is typically around 9 feet.
The maximum allowable span for a 2x6 joist in a residential deck construction project is typically around 9 feet.
The maximum span for a 2x6 board is typically around 10 feet when used as a joist or rafter in construction.
The recommended maximum span for a LVL (Laminated Veneer Lumber) floor joist in a residential construction project is typically around 20 feet.
The maximum span for 2x6 rafters in roof construction is typically around 9 feet.
Construction workers need proper nutrition to keep energy levels up on the job to reduce stresses on the body and to increase to maximum their productivity on construction sites.