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AWPA C1-03
- All Timber Products - Preservative Treatment by Pressure Processes
- standard by American Wood Protection Association, 08/01/2003
- Publisher: AWPA
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The AWPA C Standards are no longer under development and have been replaced by AWPA Standards U1 and T1. U1 contains information for end users/specifiers, and T1 contains treating requirements for manufacturers
The following requirements, as modified or supplemented by other AWPA Standards, apply to each ofthe treating processes and to all species and types of material. If these requirements are to be otherwisemodified to meet special conditions, complete detailed instructions shall be given.
Maximum time duration (total elapsed time of a treating phase), maximum temperature, and maximum pressure limits shall not be exceeded. Only those species and preservatives listed in a commodity standard that have previously been found suitable for use in this particular application, or sufficient test information has been submitted to warrant their inclusion. A phase shall begin when a change in conditions within the cylinder is initiated and shall end when either new conditions are imposed or the cylinder is emptied of preservative. For example, the period of steaming shall begin when the temperature reaches 93oC (200oF) and end when the steam is shut off in the cylinder and the cylinder vented. The minimum time duration, when stipulated for a phase, shall be the period of time after the minimum condition has been attained and until the end of that phase. All dimensions referred to are nominal dimensions for sawn four sides material.
The following requirements, as modified or supplemented by other AWPA Standards, apply to each ofthe treating processes and to all species and types of material. If these requirements are to be otherwisemodified to meet special conditions, complete detailed instructions shall be given.
Maximum time duration (total elapsed time of a treating phase), maximum temperature, and maximum pressure limits shall not be exceeded. Only those species and preservatives listed in a commodity standard that have previously been found suitable for use in this particular application, or sufficient test information has been submitted to warrant their inclusion. A phase shall begin when a change in conditions within the cylinder is initiated and shall end when either new conditions are imposed or the cylinder is emptied of preservative. For example, the period of steaming shall begin when the temperature reaches 93oC (200oF) and end when the steam is shut off in the cylinder and the cylinder vented. The minimum time duration, when stipulated for a phase, shall be the period of time after the minimum condition has been attained and until the end of that phase. All dimensions referred to are nominal dimensions for sawn four sides material.
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