KSN Anchors
24Pages

Enhanced Performance Loads in Slab-to-Wall Moment Connections Reinforcement Continuity System BUILDING PRODUCTS

KSN Anchors Safer, faster, easier construction joints Ancon KSN Anchors, in combination with Bartec parallelthreaded reinforcing bars, simplify concrete construction joints. Together, they allow engineers to design slab-to-wall connections without the restrictions on bar length and bar diameter of re-bend continuity systems or the awkward anchorage lengths demanded by reinforcing bar couplers. KSN Anchors are cast into the concrete wall and, when the formwork and thread protection are removed, the reinforcing bars are simply screwed into the anchors. This is a quicker, easier, and above all...

Eliminates risks associated with on-site Virtually unlimited Standard components delivery, direct from Easy visual check of No torqueing Reduces reinforcement EC2 indented correct bar required congestion. Ideal for construction joint engagement thin walls Enhanced performance backed by test data Best Product in Show 2013 BUILDING PRODUCTS

Ancon KSN Anchors Ancon KSN Anchors, in combination with Bartec parallel-threaded reinforcing bars, simplify concrete slab-to-wall construction joints when compared to other continuity systems. This quicker, easier and above all, safer system eliminates the need for on-site bar straightening and the drilling of formwork or concrete. The system replaces hooked anchorage bars and stirrups, thereby simplifying bar scheduling and minimising congestion in the wall. Suitable for wall thickness from 175mm. Independent tests have verified enhancements in anchor performance in moment-resisting...

Bartec Continuation Bars Unlike re-bend continuity systems where bar lengths are restricted to the box dimensions, there is virtually no restriction on continuation bar length with KSN Anchors. Ancon KSN Anchors are designed for use with 12mm, 16mm and 20mm diameter grade B500B or B500C reinforcing bar, threaded with a Bartec metric thread, supplied by Ancon. The Bartec system produces a full strength joint. The bar end is cut square and enlarged by cold forging. This increases the core diameter of the threaded portion of the bar to ensure that the strength of the bar is maintained. A...

Ancon KSN Anchors System Performance Performance values for KSN Anchors are presented on pages 10 to 14 for two load applications and are based on comprehensive test data. Direct tensile concrete characteristic loads Characteristic loads as per the CEB Design of Fastenings in Concrete: N0 = k1 . fck0.5 . heff1.5 Rk,c Where: N0 is the tension resistance of a single anchor remote from edge effects Rk,c The direct pull out strength of anchors embedded in concrete has been the subject of extensive research over many years. To determine the direct pull strength of KSN Anchors, Ancon commissioned...

Tensile concrete characteristic loads in slab-to-wall moment connections M T From the tests conducted to determine the direct pull out capacities of KSN Anchors (see page 6), Ancon identified a potential increase in anchor performance when the compression part of the moment couple lies within the pull out cone. Although design procedures for the direct pull out strength of cast-in anchors are well established, existing procedures do not cover anchors within moment resisting connections, such as slab-to-wall applications. Therefore, Ancon commissioned a further series of tests at Heriot Watt...

Key Design Considerations Effective Embedment Depth Moment Connections Seismic Applications The range of Ancon KSN Anchors, sizes 12mm to 20mm, may be used with anchor effective embedment between 75mm and 260mm. The design procedure for moment connection assumes that the top or bottom of the wall is at least three times the effective embedment of the anchor (heff) measured from the centreline of the anchor. The anchors have not been tested in seismic conditions and therefore the design tables may overestimate the load capacity if used in seismic applications. Structural Analysis Calculated...

Anchor Selection Examples Design examples for KSN top anchor with standard timber carrier: A) Load condition: Direct tensile load Slab main reinforcement spacing: 200mm c/c Assuming anchors at 200mm c/c : NEd = 175 x 0.200 = 35kN per anchor From table page 10, anchors suitable for 225mm thick wall and 35kN load. KSN12S @ 200mm c/c Anchor design resistance NRd = 37.4kN KSN12M @ 200mm c/c Anchor design resistance NRd = 41.8kN KSN16S @ 200mm c/c Anchor design resistance NRd = 39.4kN KSN16M @ 200mm c/c Anchor design resistance NRd = 43.0kN KSN20S @ 200mm c/c Anchor design resistance NRd =...

Direct Tensile Concrete Design Resistance Loads Single line of anchors in direct tension without moment: KSN Anchors Flush with Concrete Minimum Embedment Anchor - Direct Tensile Resistance Load NRd (kN) Anchor Rebar Anchor Wall Depth C32/40 Concrete at Various Ref. Dia. Length Thickness heff Horizontal Spacings KSN Anchors with Timber Carrier (Anchor Inset 33mm from Face of Concrete) Minimum Embedment Anchor - Direct Tensile Resistance Load NRd (kN) Anchor Rebar Anchor Wall Depth C32/40 Concrete at Various Ref. Dia. Length Thickness heff Horizontal Spacings Design Example A. See page 9...

Double Line of Identical Anchors in Direct Tension Without Moment: KSN Anchors Flush with Concrete Anchor Rebar Anchor Wall Embedment Slab Ref. Dia. Length Thickness Depth heff Depth Anchor - Direct Tensile Resistance Load NRd (kN) Horizontal Spacings hgff Embedment Table uses KSN Anchors with Timber Carrier (Anchor Inset 33mm from Face of Concrete) Anchor Rebar Anchor Wall Embedment Slab Ref. Dia. Length Thickness Depth heff Depth Anchor - Direct Tensile Resistance Load NRd (kN) Horizontal Spacings hgff Embedment Table uses Anchor Length Notes: All edges assumed to be at least 1.5 x...

Tensile concrete design resistance loads in wall-to-slab connections: KSN Anchors with Timber Carrier (Anchor Inset 33mm from Face of Concrete) Moment Connection - Slab Top Main Steel Reinforcement 25mm Cover Minimum Embedment Rebar Anchor Wall Depth Slab Anchor - Direct Tensile Design Resistance Load NRd (kN) C32/40 Concrete at Various Spacings Horizontal Spacing Notes: Refer to key design considerations on page 8. In addition, the tables assume no c/ose edges and a cover to the top and bottom reinforcement connecting to the anchor of 25mm. For other cover, please contact Ancon. Bold...