Perforation formulae

There are some calculations that are helpful when working with perforated sheets. On this page you will find links to formulae explaining such calculations. Please select the category of relevance in the menu to the left or click on the appropriate arrow below.

<DocumentEdition EditionId="5" Edition="English"><Fields><Field Name="Heading" FieldType="SingleLineText">Calculation of open area</Field><Field Name="Description" FieldType="TextArea">Link to formulae that can calculate the open area of perforation patterns.</Field><Field Name="Image" FieldType="Media"><img src="http://www.rmig.com:8080/erez3/erez?src=RMIG/Patterns/Perforated metal/C4U6_38.tif&tmp=1-1&top=0.33404664&bottom=0.62149533&right=0.91773564&width=214&height=88&quality=-1&format=jpeg" alt="" /></Field><Field Name="ImageAlt" FieldType="SingleLineText">Calculation of open area for perforation patterns</Field><Field Name="Link" FieldType="Link"><Link LinkType="2" OpenInNewWindow="false" LinkId="1864" Broken="false" AccessAllowed="true"><Destination TypeId="1041" ElementId="191" /><AnchorLink TypeId="-1" ElementId="-1" /><Edition Id="-1" /><Channel Id="-1" /><Url>via191.html</Url><LinkText>Calculate airflow of perforation patterns</LinkText><LinkTitle>Calculate airflow of perforation patterns</LinkTitle><AbsoluteUrl>http://www.rmig.com/en/technical+info/formulae/calculation+open+area</AbsoluteUrl></Link><Output><a href="/en/technical+info/formulae/calculation+open+area" title="Calculate airflow of perforation patterns">Calculate airflow of perforation patterns</a></Output></Field></Fields><Created><Date UtcYear="2010" UtcMonth="1" UtcDay="20" UtcHour="13" UtcMinute="6" UtcSecond="28" UtcMillisecond="807" Region="en-GB" TimeZone="GMTStandardTime" UtcOffset="0"><Day>Wednesday</Day><AbbreviatedDay>Wed</AbbreviatedDay><Month>January</Month><AbbreviatedMonth>Jan</AbbreviatedMonth><XmlDate>2010-01-20T13:06:28.807Z</XmlDate><LongDate>20 January 2010</LongDate><ShortDate>20/01/2010</ShortDate><ShortTime>13:06</ShortTime><LongTime>13:06:28</LongTime><LongDateLongTime>20 January 2010 13:06:28</LongDateLongTime><ShortDateLongTime>20/01/2010 13:06:28</ShortDateLongTime><ShortDateShortTime>20/01/2010 13:06</ShortDateShortTime></Date></Created><CreatedBy><Id>12</Id><UserName>mfd@rmig.com</UserName><Properties UserId="12"><Property Name="FirstName" /><Property Name="LastName" /><Property Name="Initials" /><Property Name="PrettyName" /><Property Name="Email">mfd@rmig.com</Property></Properties></CreatedBy><LastEdited><Date UtcYear="2010" UtcMonth="6" UtcDay="26" UtcHour="6" UtcMinute="4" UtcSecond="48" UtcMillisecond="960" Region="en-GB" TimeZone="GMTStandardTime" UtcOffset="0"><Day>Saturday</Day><AbbreviatedDay>Sat</AbbreviatedDay><Month>June</Month><AbbreviatedMonth>Jun</AbbreviatedMonth><XmlDate>2010-06-26T06:04:48.960Z</XmlDate><LongDate>26 June 2010</LongDate><ShortDate>26/06/2010</ShortDate><ShortTime>07:04</ShortTime><LongTime>07:04:48</LongTime><LongDateLongTime>26 June 2010 07:04:48</LongDateLongTime><ShortDateLongTime>26/06/2010 07:04:48</ShortDateLongTime><ShortDateShortTime>26/06/2010 07:04</ShortDateShortTime></Date></LastEdited><LastEditedBy><Id>29</Id><UserName>hva@rmig.com</UserName><Properties UserId="29"><Property Name="FirstName" /><Property Name="LastName" /><Property Name="Initials" /><Property Name="PrettyName" /><Property Name="Email">hva@rmig.com</Property></Properties></LastEditedBy><Metadata><ContentMetadata><Element ElementId="523" TypeId="1034" Type="Document" /><Element ElementId="1965" TypeId="1059" Type="File" /><Element ElementId="525" TypeId="1034" Type="Document" /></ContentMetadata></Metadata></DocumentEdition>

Calculation of open area

Link to formulae that can calculate the open area of perforation patterns.

<DocumentEdition EditionId="5" Edition="English"><Fields><Field Name="Heading" FieldType="SingleLineText">Weight of a perforated sheet</Field><Field Name="Description" FieldType="TextArea">Link to a formula that can help you to  calculate the weight of a perforated sheet.</Field><Field Name="Image" FieldType="Media"><img src="http://www.rmig.com:8080/erez3/erez?src=RMIG/Sheets/SE Campaign 2009 9.tif&tmp=1-1&top=0.17487084&left=0.075&bottom=0.72670807&right=0.97523674&width=214&height=88&quality=-1&format=jpeg" alt="" /></Field><Field Name="ImageAlt" FieldType="SingleLineText">Calculate the weight of a perforated sheet</Field><Field Name="Link" FieldType="Link"><Link LinkType="2" OpenInNewWindow="false" LinkId="1865" Broken="false" AccessAllowed="true"><Destination TypeId="1041" ElementId="192" /><AnchorLink TypeId="-1" ElementId="-1" /><Edition Id="-1" /><Channel Id="-1" /><Url>via192.html</Url><LinkText>Calculate the weight of a perforated sheet</LinkText><LinkTitle>Calculate the weight of a perforated sheet</LinkTitle><AbsoluteUrl>http://www.rmig.com/en/technical+info/formulae/weight+perforated+sheet</AbsoluteUrl></Link><Output><a href="/en/technical+info/formulae/weight+perforated+sheet" title="Calculate the weight of a perforated sheet">Calculate the weight of a perforated sheet</a></Output></Field></Fields><Created><Date UtcYear="2010" UtcMonth="1" UtcDay="20" UtcHour="13" UtcMinute="16" UtcSecond="52" UtcMillisecond="740" Region="en-GB" TimeZone="GMTStandardTime" UtcOffset="0"><Day>Wednesday</Day><AbbreviatedDay>Wed</AbbreviatedDay><Month>January</Month><AbbreviatedMonth>Jan</AbbreviatedMonth><XmlDate>2010-01-20T13:16:52.740Z</XmlDate><LongDate>20 January 2010</LongDate><ShortDate>20/01/2010</ShortDate><ShortTime>13:16</ShortTime><LongTime>13:16:52</LongTime><LongDateLongTime>20 January 2010 13:16:52</LongDateLongTime><ShortDateLongTime>20/01/2010 13:16:52</ShortDateLongTime><ShortDateShortTime>20/01/2010 13:16</ShortDateShortTime></Date></Created><CreatedBy><Id>12</Id><UserName>mfd@rmig.com</UserName><Properties UserId="12"><Property Name="FirstName" /><Property Name="LastName" /><Property Name="Initials" /><Property Name="PrettyName" /><Property Name="Email">mfd@rmig.com</Property></Properties></CreatedBy><LastEdited><Date UtcYear="2010" UtcMonth="6" UtcDay="26" UtcHour="20" UtcMinute="39" UtcSecond="8" UtcMillisecond="987" Region="en-GB" TimeZone="GMTStandardTime" UtcOffset="0"><Day>Saturday</Day><AbbreviatedDay>Sat</AbbreviatedDay><Month>June</Month><AbbreviatedMonth>Jun</AbbreviatedMonth><XmlDate>2010-06-26T20:39:08.987Z</XmlDate><LongDate>26 June 2010</LongDate><ShortDate>26/06/2010</ShortDate><ShortTime>21:39</ShortTime><LongTime>21:39:08</LongTime><LongDateLongTime>26 June 2010 21:39:08</LongDateLongTime><ShortDateLongTime>26/06/2010 21:39:08</ShortDateLongTime><ShortDateShortTime>26/06/2010 21:39</ShortDateShortTime></Date></LastEdited><LastEditedBy><Id>29</Id><UserName>hva@rmig.com</UserName><Properties UserId="29"><Property Name="FirstName" /><Property Name="LastName" /><Property Name="Initials" /><Property Name="PrettyName" /><Property Name="Email">hva@rmig.com</Property></Properties></LastEditedBy><Metadata><ContentMetadata><Element ElementId="523" TypeId="1034" Type="Document" /><Element ElementId="1965" TypeId="1059" Type="File" /><Element ElementId="525" TypeId="1034" Type="Document" /><Element ElementId="2499" TypeId="1059" Type="File" /><Element ElementId="526" TypeId="1034" Type="Document" /></ContentMetadata></Metadata></DocumentEdition>

Weight of a perforated sheet

Link to a formula that can help you to calculate the weight of a perforated sheet.

<DocumentEdition EditionId="5" Edition="English"><Fields><Field Name="Heading" FieldType="SingleLineText">Size of an unfolded sheet</Field><Field Name="Description" FieldType="TextArea">Link to formulae that can calculate the flat size of a sheet.</Field><Field Name="Image" FieldType="Media"><img src="http://www.rmig.com:8080/erez3/erez?src=RMIG/Sheets/Step (SQUARE) LR 7x20 ANTI-SKID HIGH SECURITY.tif&tmp=1-1&top=0.67757009&left=0.2306712&bottom=0.97196262&right=0.94658029&width=214&height=88&quality=-1&format=jpeg" alt="" /></Field><Field Name="ImageAlt" FieldType="SingleLineText">Folded perforated sheet</Field><Field Name="Link" FieldType="Link"><Link LinkType="2" OpenInNewWindow="false" LinkId="1863" Broken="false" AccessAllowed="true"><Destination TypeId="1041" ElementId="193" /><AnchorLink TypeId="-1" ElementId="-1" /><Edition Id="-1" /><Channel Id="-1" /><Url>via193.html</Url><LinkText>Calculate size of an unfolded sheet</LinkText><LinkTitle>Calculate size of an unfolded sheet</LinkTitle><AbsoluteUrl>http://www.rmig.com/en/technical+info/formulae/size+unfolded+sheet</AbsoluteUrl></Link><Output><a href="/en/technical+info/formulae/size+unfolded+sheet" title="Calculate size of an unfolded sheet">Calculate size of an unfolded sheet</a></Output></Field></Fields><Created><Date UtcYear="2010" UtcMonth="1" UtcDay="20" UtcHour="12" UtcMinute="38" UtcSecond="34" UtcMillisecond="533" Region="en-GB" TimeZone="GMTStandardTime" UtcOffset="0"><Day>Wednesday</Day><AbbreviatedDay>Wed</AbbreviatedDay><Month>January</Month><AbbreviatedMonth>Jan</AbbreviatedMonth><XmlDate>2010-01-20T12:38:34.533Z</XmlDate><LongDate>20 January 2010</LongDate><ShortDate>20/01/2010</ShortDate><ShortTime>12:38</ShortTime><LongTime>12:38:34</LongTime><LongDateLongTime>20 January 2010 12:38:34</LongDateLongTime><ShortDateLongTime>20/01/2010 12:38:34</ShortDateLongTime><ShortDateShortTime>20/01/2010 12:38</ShortDateShortTime></Date></Created><CreatedBy><Id>12</Id><UserName>mfd@rmig.com</UserName><Properties UserId="12"><Property Name="FirstName" /><Property Name="LastName" /><Property Name="Initials" /><Property Name="PrettyName" /><Property Name="Email">mfd@rmig.com</Property></Properties></CreatedBy><LastEdited><Date UtcYear="2010" UtcMonth="6" UtcDay="26" UtcHour="21" UtcMinute="23" UtcSecond="15" UtcMillisecond="590" Region="en-GB" TimeZone="GMTStandardTime" UtcOffset="0"><Day>Saturday</Day><AbbreviatedDay>Sat</AbbreviatedDay><Month>June</Month><AbbreviatedMonth>Jun</AbbreviatedMonth><XmlDate>2010-06-26T21:23:15.590Z</XmlDate><LongDate>26 June 2010</LongDate><ShortDate>26/06/2010</ShortDate><ShortTime>22:23</ShortTime><LongTime>22:23:15</LongTime><LongDateLongTime>26 June 2010 22:23:15</LongDateLongTime><ShortDateLongTime>26/06/2010 22:23:15</ShortDateLongTime><ShortDateShortTime>26/06/2010 22:23</ShortDateShortTime></Date></LastEdited><LastEditedBy><Id>29</Id><UserName>hva@rmig.com</UserName><Properties UserId="29"><Property Name="FirstName" /><Property Name="LastName" /><Property Name="Initials" /><Property Name="PrettyName" /><Property Name="Email">hva@rmig.com</Property></Properties></LastEditedBy><Metadata><ContentMetadata><Element ElementId="523" TypeId="1034" Type="Document" /><Element ElementId="1965" TypeId="1059" Type="File" /><Element ElementId="525" TypeId="1034" Type="Document" /><Element ElementId="2499" TypeId="1059" Type="File" /><Element ElementId="526" TypeId="1034" Type="Document" /><Element ElementId="2525" TypeId="1059" Type="File" /><Element ElementId="524" TypeId="1034" Type="Document" /></ContentMetadata></Metadata></DocumentEdition>

Size of an unfolded sheet

Link to formulae that can calculate the flat size of a sheet.

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Perforation formulae

Calculation of open area

Weight of a perforated sheet

Size of an unfolded sheet

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