Transcription

1 TYPE: LSF - LIFTING STUD FOOT ANCHOR DESCRIPTION: The design of the anchor means no additional reinforcement is required as the forces are transferred into the concrete from the design of the foot of the anchor pin. DIMENSIONS & SWL: PART CODE * LOAD AXIAL LOAD DIMENSIONS GROUP (Kg) L D1 d D2 LSF13/ LSF13/ LSF13/ LSF13/ LSF25/ LSF25/ LSF25/ LSF25/ LSF50/ LSF50/ LSF50/ LSF50/ LSF50/ LSF50/ LSF75/ LSF75/ LSF75/ LSF75/ LSF75/ LSF10/ LSF10/ LSF10/ LSF10/ LSF15/ * Part Codes LSF15/ Following suffix should be added LSF15/ for required anchor finish. LSF20/ B - Black Self Colour Mill Finish LSF20/ G - Hot Dipped Galv LSF20/ S - Grade 304 Stainless Steel LSF32/ LSF32/ LSF32/ /5

2 SYSTEM INTRODUCTION: The PCT LSF range of lifting pins used for the transportation, lifting and mounting of concrete elements. This lifting system is the safest method to transport concrete elements through the air. The LSF system exists of three main products. That is a LSF anchor which is poured in the concrete together with a rubber recess former to form a void for the lifting clutch used to safely lift the system. Each load group has a range of anchor lengths to allow for different installation situations. Lifting Stud Foot Anchors efficiently transmit the applied load to the concrete through the conical foot of the anchor. This foot induces a shear cone in the concrete that resists pullout. The three main factors that affect pullout capacity are : - The embedment depth of the anchor. The compressive strength (f c) of the concrete at time of lift. The proximity of the anchor to free edges or other anchors. The Standard Length Foot Anchors in each load group have been designed to provide the full S.W.L. of the clutch under most conditions: Foot anchors should not be used where concrete strength is <10N/ Edge distances less than 3 x anchor length can reduce pullout load. Anchor spacing less than 6 x anchor length can reduce pullout load. Standard Length Anchors should always be used unless otherwise specified. Where short foot anchors are used in thin sections the longest possible anchor should always be used. SYSTEM IDENTIFICATION: The PCT LSF range of anchors are clearly marked to ensure the user selects the correct part every time and that after casting it is possible to see the correct sized anchor has been used. The head of the anchor that remains visible after casting holds information such as The LOAD GROUP The Anchor Length The manufacturer The foot of the anchor contains a batch number that allows us to trace each batch of anchors form steel mill to customers factory. 2/5

3 LSF ANCHOR CAPACITY CHART: This chart details the Safe Working Limits (SWL) of the LIFTING STUD FOOT ANCHOR for the given strength of the concrete at time of lifting. Min edge distance = 3 times anchor length without capacity reduction. Min anchor spacing = 6 times anchor length without capacity reduction. PART CODE LSF13/055 LOAD GROUP ANCHOR 10kN LSF13/ LSF13/ kN 20kN 25kN 30kN LSF13/ LSF25/ LSF25/ LSF25/ LSF25/ LSF50/ LSF50/ LSF50/ LSF50/ LSF50/ LSF50/ LSF75/095 LSF75/ LSF75/ LSF75/ LSF75/ LSF10/ LSF10/ LSF10/ LSF10/ LSF15/ LSF15/ LSF15/ LSF20/ LSF20/ LSF20/ LSF32/ LSF32/ LSF32/ /5

4 STD LSF ANCHORS WITH REDUCED EDGE DISTANCES: Where the minimum edge distance or anchor spacing's are not able to be met then the SWL of the anchor will be reduced to maintain the safety factor of 3. This chart details the SWL of the LSF Anchors where it is not possible to have a edge distance of 3 x the anchor length. STANDARD ANCHOR EDGE DISTANCE (mm) 10kN 15kN 20kN 25kN 30kN t x 120mm Use 240mm anchor for t x 170mm Use 340mm anchor for t x 240mm Use 480mm anchor for t x 340mm t x 500mm /5

5 STD LSF ANCHORS IN THIN PANELS: Where thin panels are made using the LSF anchors reduced SWL will apply. This chart details the SWL of the LSF standard length anchors when used in thin panels. Note: The working loads in the chart below can be doubled (up to Clutch Load Rating) if extra long anchors are used for these load groups i.e. STANDARD ANCHOR PANEL THICKNESS D (mm) 10kN 15kN 20kN 25kN 30kN t x 120mm t x 170mm t x 240mm t x 340mm t x 500mm ANGLED PULL REINFORCEMENT FOR LSF ANCHORS: LOAD While the LSF anchor can be used without the need for additional Rb1 Ar L GROUP reinforcement there are circumstances where this is required is in thin panels which are subjected to an angled pull load. The angled pull reinforcement MUST be installed as close as possible under the recess former and making full contact with the anchor pin. DO NOT WELD angled pull reinforcement to the anchor pin /5