{"id":33468,"date":"2026-04-27T12:52:51","date_gmt":"2026-04-27T12:52:51","guid":{"rendered":"https:\/\/protasoftware.com\/technical-manuals\/structural-modelling\/how-to-model-inclined-sloping-slab\/"},"modified":"2026-06-19T12:37:46","modified_gmt":"2026-06-19T12:37:46","slug":"how-to-model-inclined-sloping-slab","status":"publish","type":"wiki","link":"https:\/\/protasoftware.com\/wiki\/how-to-model-inclined-sloping-slab\/","title":{"rendered":"How To Model Inclined Sloping Slab"},"content":{"rendered":"
\n

To create a sloping slab panel you must first define a <\/span><\/span>Plane <\/span><\/span><\/b>to align it to. Once the plane has been defined the slab can simply be moved into the new plane.  This method can also be used to model inclined \/ slanting beams.
<\/span><\/span><\/p>\n


\n <\/span><\/span><\/p>\n

We will use a simple table top model as illustration  (as shown below).<\/span><\/span><\/p>\n

\n
\n
\n \n <\/div>\n
    \n
  1. Press \u201c<\/span><\/span>Plane Definition<\/span><\/span><\/i><\/b>\u201d  <\/span><\/span> button in the top Modelling<\/b> tab
    <\/span><\/span><\/li>\n


    \n <\/span><\/span><\/p>\n

  2. The \u201c<\/span><\/span>Plane Properties<\/span><\/span><\/b>\u201d form will be loaded.
    <\/span><\/span><\/li>\n


    \n <\/span><\/span><\/p>\n

  3. Left-click<\/span><\/span><\/b> in the region of the slab and the plane will  be inserted.<\/span><\/span><\/li>\n<\/ol>\n

    Initially, as shown below, the plane is placed horizontally at the storey level – the level and inclination being controlled by three node points at the corners of the plane (\u201c<\/span><\/span>Point: 1<\/span><\/span><\/i> \u201c, \u201c<\/span><\/span>Point: 2<\/span><\/span><\/i>\u201d and \u201c<\/span><\/span>Point: 3<\/span><\/span><\/i>\u201d fields).  A plane is completely defined by 3 points so the 4<\/span><\/span>th<\/span><\/span><\/sup> point is calculated internally & not shown in the dialog<\/span>.<\/span><\/span><\/p>\n

    \n
    \n \n <\/div>\n

    When plane member is first defined, all the values in the \u201c<\/span><\/span>Z<\/span><\/span><\/i>\u201d fields will be zero. This means that plane is parallel to the storey level and at the same level. If you enter a positive value to the \u201cZ\u201d field of a corner point related corner point will be raised by that amount relative to the storey level. A negative value will lower the point. <\/span><\/span>
    <\/span><\/p>\n


    \n <\/span><\/p>\n


      \n <\/span><\/p>\n
    1. Input <\/span><\/span>Point 1 Z <\/span><\/span><\/b>= -1000, while leaving Point 2 and Point 3 = 0mm > <\/span><\/span>Update<\/span><\/span>
      <\/span><\/b>This effectively means Point 1 (& invisible Point 4 ) is lowered by 1000mm<\/span><\/span><\/li>\n


      \n <\/span><\/p>\n

    2. Right-click > <\/span><\/span>Move member to Plan Definition<\/span><\/span><\/b> ><\/span><\/span> Yes<\/span><\/span><\/b> to confirm.<\/span><\/span>
      <\/li>\n<\/ol>\n

      As shown below, all members contained within, or at the edge of the plane are adjusted to the plane.<\/span><\/p>\n

      \n
      \n \n <\/div>\n

      \n

      \n
      \n <\/p>\n
      \n For more detail information on the
      \n <\/span>Plane Properties<\/span><\/b>, refer to this article :<\/span> 
      \n Working with Planes<\/a>\n <\/div>\n

      <\/span>\n <\/div>\n<\/p><\/div>\n

      If you bring out the <\/span>Beam Properties<\/span><\/b> of the slanting beam > <\/span>3D <\/span><\/b>tab, the values of the <\/span>del Z-I <\/span><\/b>= -1000mm & <\/span>delZ -J <\/span><\/b>=0 are auto calculated.  These values are associated (locked) to the plane P1 and cannot be changed. If required, either I or J end can be dissociated from the plane by clicking the <\/span>X <\/span><\/b>sign.<\/span><\/p>\n

      <\/p>\n

      Similarly, the <\/span><\/span>Column Properties<\/span><\/span><\/b> > <\/span><\/span>3D <\/span><\/span><\/b>tab of the column will reveal <\/span><\/span>del z (Top)<\/span><\/span><\/b> = -1000mm &  it is locked to plane P1. Similarly, it can be dissociated from the plane by clicking the<\/span> <\/span>X <\/span><\/b><\/span>sign.<\/span><\/span><\/p>\n

      \n
      \n \n <\/div>\n<\/div>\n
      \n
      \n
      \n <\/span><\/p>\n

      \n <\/span><\/p>\n
      Similarly, the beams will be locked to the plane. To learn other methods to model slanting beam refer here : <\/span><\/span>
      \n       How to model slanting \/ inclined beam<\/span><\/a>
      \n  <\/span><\/span>
      \n \n <\/div>\n<\/p><\/div>\n

      <\/span>\n <\/div>\n

      \n <\/span><\/span>
      \n \n <\/div>\n<\/div>\n
      \n \n<\/div>\n","protected":false},"excerpt":{"rendered":"

      To create a sloping slab panel you must first define a Plane to align it to. Once the plane has been defined the slab can…<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"template":"","meta":{"_whitepaper_youtube_videos":"[{\"url\":\"https:\/\/www.youtube.com\/watch?v=Rw22ZyHAPdg\",\"thumbnail\":\"https:\/\/i.ytimg.com\/vi\/Rw22ZyHAPdg\/default.jpg\",\"type\":\"video\",\"title\":\"Tooltip: How to Model Composite Slabs\"}]","_whitepaper_youtube_url":"https:\/\/www.youtube.com\/watch?v=Rw22ZyHAPdg","_whitepaper_youtube_thumbnail":"https:\/\/i.ytimg.com\/vi\/Rw22ZyHAPdg\/default.jpg","footnotes":""},"categories":[185],"whitepaper_topic":[],"whitepaper_product":[],"whitepaper_type":[],"class_list":["post-33468","wiki","type-wiki","status-publish","hentry","category-structural-modelling"],"yoast_head":"\nHow To Model Inclined Sloping Slab - Prota Software<\/title>\n<meta name=\"description\" content=\"To create a sloping slab panel you must first define a Plane to align it to. Once the plane has been defined the slab can simply be moved into the new\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/protasoftware.com\/wiki\/how-to-model-inclined-sloping-slab\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Prota Software\" \/>\n<meta property=\"og:description\" content=\"To create a sloping slab panel you must first define a Plane to align it to. Once the plane has been defined the slab can simply be moved into the new\" \/>\n<meta property=\"og:url\" content=\"https:\/\/protasoftware.com\/wiki\/how-to-model-inclined-sloping-slab\/\" \/>\n<meta property=\"og:site_name\" content=\"Prota Software\" \/>\n<meta property=\"article:modified_time\" content=\"2026-06-19T12:37:46+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/desk.zoho.com\/DocsDisplay?zgId=672206093&mode=inline&blockId=kr8xqf8303471ef684a3c9324c9cf134bf5ec\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Prota Software\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/protasoftware.com\\\/wiki\\\/how-to-model-inclined-sloping-slab\\\/\",\"url\":\"https:\\\/\\\/protasoftware.com\\\/wiki\\\/how-to-model-inclined-sloping-slab\\\/\",\"name\":\"How To Model Inclined Sloping Slab - Prota Software\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/protasoftware.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/protasoftware.com\\\/wiki\\\/how-to-model-inclined-sloping-slab\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/protasoftware.com\\\/wiki\\\/how-to-model-inclined-sloping-slab\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/desk.zoho.com\\\/DocsDisplay?zgId=672206093&mode=inline&blockId=kr8xqf8303471ef684a3c9324c9cf134bf5ec\",\"datePublished\":\"2026-04-27T12:52:51+00:00\",\"dateModified\":\"2026-06-19T12:37:46+00:00\",\"description\":\"To create a sloping slab panel you must first define a Plane to align it to. 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