{"id":36779,"date":"2026-01-30T15:55:47","date_gmt":"2026-01-30T15:55:47","guid":{"rendered":"https:\/\/cortartec.net\/produto\/armaduras-anti-puncoamento\/"},"modified":"2026-05-12T16:33:50","modified_gmt":"2026-05-12T16:33:50","slug":"anti-puncture-armor","status":"publish","type":"product","link":"https:\/\/cortartec.net\/en\/produto\/anti-puncture-armor\/","title":{"rendered":"Anti-puncture armor"},"content":{"rendered":"

[vc_row][vc_column][vc_column_text css=”” woodmart_inline=”no” text_larger=”no”]<\/p>\n

PUNCHING REINFORCEMENT <\/strong><\/h2>\n

The weight of a slab supported on a column induces shear stresses in the slab. These stresses, if sufficient and where no additional reinforcement is provided, would result in the column \u2018punching\u2019 through the slab. This punching shear is similarly induced at the base where the column rests. Although punching shear can be mitigated by localized thickening of the concrete with support beams and enlarged column heads, flat slab construction offers many advantages. A consistent floor-to-floor height can reduce the overall height of a building and provide significant time and material savings.<\/p>\n

Typical Arrangements<\/strong><\/h2>\n

Our Shearfix system is suitable for all column shapes and locations. The layout of the Shearfix rails is determined by the design calculation or the design program. Some of the typical arrangements are shown here.<\/p>\n

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O peso de uma laje de suporte sobre um pilar induz tens\u00f5es de corte na laje. Estas tens\u00f5es, s\u00e3o suficientes, quando o refor\u00e7o adicional n\u00e3o \u00e9 previsto, resultam na \u201cperfura\u00e7\u00e3o\u201d pelo pilar atrav\u00e9s da laje. Este efeito de perfura\u00e7\u00e3o \u00e9 igualmente induzido na base da coluna. Embora o pun\u00e7oamento possa ser aliviado por espessamento localizado do cimento com vigas penduradas e atenuado por capiteis salientes dos pilares, a constru\u00e7\u00e3o de lajes planas oferece muitas vantagens. Cortartec Shearfix \u00e9 a solu\u00e7\u00e3o ideal para a conce\u00e7\u00e3o e constru\u00e7\u00e3o de problemas associados com pun\u00e7oamento. O sistema \u00e9 composto por conectores de duas cabe\u00e7as soldadas a barras planas e s\u00e3o posicionados ao redor do topo do pilar ou na base. A for\u00e7a do corte da laje \u00e9 transferida atrav\u00e9s dos conectores para dentro da coluna. Os conectores s\u00e3o soldados para o rail em centros determinados or c\u00e1lculo do projeto. Cortartec Shearfix \u00e9 adequado para todas as formas de colunas e \u00e9 muito f\u00e1cil de instalar o \u2018top down\u2019 ou \u2018de baixo para cima\u2019, dependendo da prefer\u00eancia em obra.<\/p>\n<\/div>\n<\/div>\n

[\/vc_column_text]\t\t

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Radial Layouts<\/h2>\n\t\t<\/div>\r\n\t\t[\/vc_column][\/vc_row][vc_row][vc_column width=”1\/3″][vc_single_image image=”36822″ img_size=”full” css=”” parallax_scroll=”no” woodmart_inline=”no”][\/vc_column][vc_column width=”1\/3″][vc_single_image image=”36823″ img_size=”full” css=”” parallax_scroll=”no” woodmart_inline=”no”][\/vc_column][vc_column width=”1\/3″][vc_single_image image=”36824″ img_size=”full” css=”” parallax_scroll=”no” woodmart_inline=”no”][\/vc_column][\/vc_row][vc_row][vc_column]\t\t
\r\n\t\t\t

Cruciform Layouts<\/h2>\n\t\t<\/div>\r\n\t\t[\/vc_column][\/vc_row][vc_row][vc_column width=”1\/3″][vc_single_image image=”36825″ img_size=”full” css=”” parallax_scroll=”no” woodmart_inline=”no”][\/vc_column][vc_column width=”1\/3″][vc_single_image image=”36826″ img_size=”full” css=”” parallax_scroll=”no” woodmart_inline=”no”][\/vc_column][vc_column width=”1\/3″][vc_single_image image=”36827″ img_size=”full” css=”” parallax_scroll=”no” woodmart_inline=”no”][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/4″][vc_single_image image=”36828″ img_size=”full” css=”” parallax_scroll=”no” woodmart_inline=”no”][\/vc_column][vc_column width=”3\/4″]\t\t
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Sizes\/Configurations<\/strong><\/h3>\n

The Shearfix system consists of double-headed studs welded to flat channels. It is manufactured to meet the specific needs of each application. The bolts are manufactured in five diameters (10, 12, 16, 20, and 25 mm) from CARES B500C-approved reinforcing bar. The heads are hot-forged to three times the bar diameter. Bolts are manufactured in virtually any length to accommodate the slab depth, but are typically produced in 5-mm increments within the 100\u20131000 mm range. The bar used in this system has a characteristic yield strength of 500 N\/mm\u00b2. The studs are welded to the rail at centers determined by the design calculation. Shearfix rails are manufactured from steel strips, 16 mm wide x 3 mm thick for bolts up to 16 mm in diameter and 20 mm x 5 mm for the two bolt diameters. The rails have rounded ends to reduce the risk of injury during handling. The space between the strips allows concrete to flow through during pouring and also allows the rail to be nailed through spacers to the formwork when installed \u201cfrom the bottom up,\u201d that is, before any other reinforcement.<\/p>\n\t\t<\/div>\r\n\t\t[\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

Technical Data Sheet<\/a><\/strong><\/span>
\nDWG<\/a><\/strong><\/span><\/p>\n","protected":false},"featured_media":36780,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[339],"product_tag":[],"class_list":["post-36779","product","type-product","status-publish","has-post-thumbnail","product_cat-structures","first","instock","shipping-taxable","product-type-simple"],"yoast_head":"\nAnti-puncture armor - Cortartec | Equipamentos para a constru\u00e7\u00e3o civil<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cortartec.net\/en\/produto\/anti-puncture-armor\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Anti-puncture armor - Cortartec | Equipamentos para a constru\u00e7\u00e3o civil\" \/>\n<meta property=\"og:description\" content=\"Technical Data Sheet DWG\" \/>\n<meta property=\"og:url\" content=\"https:\/\/cortartec.net\/en\/produto\/anti-puncture-armor\/\" \/>\n<meta property=\"og:site_name\" content=\"Cortartec | Equipamentos para a constru\u00e7\u00e3o civil\" \/>\n<meta property=\"article:modified_time\" content=\"2026-05-12T16:33:50+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cortartec.net\/wp-content\/uploads\/2026\/01\/imagem1-1-ogdigc3yh4j0ude4v842sjeffnc86adovlwiidi18q.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"300\" \/>\n\t<meta property=\"og:image:height\" content=\"225\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/cortartec.net\\\/en\\\/produto\\\/anti-puncture-armor\\\/\",\"url\":\"https:\\\/\\\/cortartec.net\\\/en\\\/produto\\\/anti-puncture-armor\\\/\",\"name\":\"Anti-puncture armor - 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