MGF TECHNICAL FILE SHEET PILES. Description. Product Notes.

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1 Description MGF interlocking steel sheet piles are a high strength sheeting system generally specified to support the vertical faces of large excavations between 4m and 13m in depth. The piles are fully compatible with the MGF shoring product range. Interlocking piles should be specified to prevent water ingress where significant groundwater is anticipated. They are installed using specialist equipment such as impact hammers, vibrating pile drivers or hydraulic presses (subject to suitability of the equipment for driving the piles into the anticipated ground ). The piles are sourced in 0.5m increments of length from major EU steel mills in grade S390 (BS EN Part 1). Handling holes are provided as standard at one end of the sheet. MGF design and specify the piles in accordance with the relevant standards and guidance documents listed in section 1. MGF can supply the piles with a range of compatible lifting chains, Quick Release Shackles, extractors, Edgesafe edge protection panels, Laddersafe access platforms and GRP or wooden pole ladders and Davitsafe retrieval/fall arrest systems. Product Notes 1. Interlocking steel sheet piles should only be specified, installed and removed by competent persons using specialist equipment selected to suit the size of sheet pile and the anticipated ground / site constraints. 2. Sheet piles are heavy and difficult to handle/pitch on site and these operations should only be carried out by experienced banksmen. Always ensure that the excavator has sufficient reach to safely lift the sheets, the piles are not lifted over personnel and that the trailing ropes on Quick Release Shackles cannot snag. Great care should be taken to avoid trapping fingers whilst pitching the piles. Additional care must be taken in windy when it is recommended that at least 2 persons are used to pitch the piles. 3. A range of corner piles are available when significant groundwater is anticipated to maintain full interlocks along the perimeter of cofferdam structures. Waterproof clutch sealants can be supplied by MGF to provide additional water tightness. 4. For cantilevered sheet pile wall designs a relevant borehole log must always be provided extending well beyond the toe of the sheet. 5. When stacking piles on site it is recommended that they are placed in bundles of no more than 6 sheets and staggered on timber spacers to allow for ease of handling and to minimise the risk of trapping hands/fingers. 6. Other pile lengths, profiles and grades are available upon request. 7. In order to assist installation MGF can supply guide walings. For availability and details contact MGF direct. 8. Sheet piles must only be removed using MGF extractors. Use of a quick release shackle for extraction will lead to damage of the spring mechanism. 9. Interlocking sheet piles are often specified for permanent works applications and are capable of providing significant vertical foundation support to structures. Contact MGF Design for more details. design@mgf.ltd.uk 5.1.1

2 Sheet Type Material Grade Max SWL (knm/m) Temporary Permanent* Section Modulus (cm 3 /m) Moment of Inertia (cm 4 /m) Weight per m (kg/m) Weight per m 2 (kg/m 2 ) GU8N S390 GP (103.8) (88.8) 770 (356) (3837) GU13N S390 GP (180.1) (166.8) 1270 (624) (8598) GU16N S390 GP (215.4) (193.8) 1670 (746) (10972) GU18N S390 GP (220.6) (198.4) 1800 (763) (11383) GU21N S390 GP (243.4) (219.0) 2060 (842) (13326) GU23N S390 GP (253.5) (228.0) 2335 (877) (14187) PU28-1 S390 GP (262.3) (236.1) 2680 (908) (15335) PU32 S390 GP (287.9) (259.1) 3200 (996) (17226) N.B. - Values in brackets apply when sheets are not fully interlocked * Permanent capacity does not take into account loss of thickness due to corrosion for further details please contact MGF Design PU28-1 Sheet Pile also known as GU27N PU32N Sheet Pile also known as GU32N GU8N product ID lengths: 5.0m for easy driving GU13N product ID lengths: 6.0m for easy to normal driving GU16N product ID lengths: 7.0m for normal driving Tel

3 GU18N product ID lengths: 7.0m for normal driving N.B. Choice of a sheet profile is normally governed by driveability considerations GU21N product ID lengths: 7.0m for normal to hard driving GU23N product ID lengths: 8.0m for hard driving PU28-1 product ID lengths: 8.0m for hard driving Further sheet lengths can be supplied. Please contact MGF for details design@mgf.ltd.uk 5.1.3

4 PU32 product ID lengths: 8.0m for hard driving Each sheet is supplied with Φ40 handling hole compatible with MGF and 6t pitching shackles and extractors. Extra holes can be provided upon request. Corner Piles Interlock Detail The interlock allows for up to 5 horizontal deviation between each successive sheet. BS20 / C14 The BS20 Corner Pile is suitable for 90 internal corners and is compatible with all the MGF pile profiles. Angle = 90 Mass per Metre = 14.4kg/m BS20 / C14 Omega The Omega Corner Pile is suitable for 90 to 135 internal corners and is compatible with all the MGF pile profiles. Angle = Mass per Metre = 18.0kg/m Omega E22 / C9 The E22 / C9 Corner Pile is suitable for 90 internal corners and is compatible with all the MGF pile profiles. The Corner Pile is welded to the pan of an interlocked pile to give added flexibility for interlocking sheet frames. Angle = 90 Mass per Metre = 9.3kg/m E22 / C MGF CAD blocks are available to assist with sizing of interlocked cofferdams utilising various combinations of corner piles. Tel

5 Extractors MGF manufacture and supply 6t SWL pile extractors for the safe removal of MGF sheet piles. Extractors should always be inspected for damage prior to each use. Prior to extraction ensure that the pin is located in the pile/ sheet handling hole with an r-clip attached, and fully locked to prevent accidental release during extraction. Extractors are designed to cope with large extraction forces but must not be violently shaken or snatched. Desc. Product ID Weight (kg) 6t Quick Release Shackles MGF manufacture and supply 6t Quick Release Shackles (QRS s) for the safe and efficient handling and pitching of MGF sheet piles. MGF QRS s are supplied with rope lines to allow the release of piles/sheets once pitched. All MGF pitching shackles feature a simple safety mechanism that prevents the accidental release of the shackle in the event the rope snags. A short length of chain is attached from the lever arm of the shackle to a metal ring, to which the nylon rope line is attached. When this is in use it ensures that the rope cannot snag and release the mechanism. QRS s should always be inspected for damage prior to each use - especially the spring mechanism, which can be easily damaged by use as an extractor (for which they are not designed). They must not be violently shaken or snatched prior to lifting piles always ensure pin is fully engaged. Desc. Product ID Weight (kg) 6t design@mgf.ltd.uk 5.1.5

6 MGF Trench Sheets and Walers Tel