APPENDIX 2a RCT intrusive survey report 0 Report/Photographs - Marked up Drawings November 2016 (Q ROBERTSON Aftercare Progress Report Progress Report August?16 Angus School inspections Woodlands PS Following the visual inspections the decision was made to carry out intrusive surveys at all the schools within the scope of works to satisfy Angus Council that the structures have been built as intended and concerns of structure failure were removed from the equation. Arrangements were made to carry out the investigations on 27/08/16. The investigation took place externally at random locations and the ?ndings were as follows. Photos of the ?ndings were forwarded to WA. Fairhurst for review. Head Restraints No investigations regarding head restraint details were carried out on the day, as the investigations over ran and an additional visit with the project engineer will be arranged. Bed Reinforcing Walls are constructed with two skins of 100mm block tied together to achieve a 215mm wall. No bed reinforcing has been speci?ed. Wall Ties Where the wall was constructed of timber frame the wall ties were found to have an embedment of 70mm. Where the wall is constructed with a masonry cavity the exposed wall ties were found to have an embedment of around 30mm. These areas consist of 2no panels on the games hall and one to the rear at the plant room. The two panels on the games hall are approximately 5m wide and 4.4m high, supported at both ends with steel columns encased with facing brick, and the panel to the rear is a single storey panel approximately 3m long 3m high. Remedial works will have to be carried out and an urgent response from Fairhurst is being requested. -f Angus Council was present throughout the investigation location 3. Cavity width 50mm Embedmant 70mm in n" I I Il?l?i I l" 1m '3 d" calm? .bn nun slim: ?umna] 'z un?a? a: :?au nix :mx ?gum is: a . a! ?3 tam .EDE Juan 1. Wantir: to the 'an c-f rammed brick wad: ashon an approximntc of 20mm Lennon 3. Wail tie embedmem ol? Iwg'h?l Loo L. um. 70M EMMDMENT II HWENT JOINT WALL TE - DETAIL I WALL TIE - DETAIL 2 DETAIL A WALL TIE - DETAIL 3 WALL TIE - DETAIL 4 ?4315b L05 2. wwb?f? ?050"! 31 a um (:55 ll? Fl Larth WALL TIE - DETAIL 5 WALL TIE - DETAIL 5 WALL TIE - DETAIL 3' WALL TIE DETAIL 6 WALL TIE - DETAIL 9 Lac .1. ?ame. 6am: Irv-to MEG. TIES a? snou- w.m :wavm ?mm mu. n: - alarm 13 WALL TIE - 05m. 12 WALL n: - DETAIL wm. n3 - DETAIL 1/ J. GROUND FLOOR WALL TIE - DETAIL 14 WALL TIE - DETAIL IS WALL TIE - DETAIL IE WALL TIE DETAIL - I WALL TIE - DETAIL 18 PORTAL CABLE ENTERS WALL TIE - DETAIL 19 WALL TIE DETAIL 19 GRID LINE I. GRIDS 3 TD GRID UNE I. GRIDS A TO Ind. ?Il?nim II mm mm. SCHOOLS .- cmuousnz II II I- m1 Rheum JOINT LOCATIONS 3; 3 AND WALL TIE DETAILS 1mm I 50299 -SS-561 A .l a .1 mlnl??lm APPENDIX 2b Variations from design I off} I if? rm: was mm NEW: If; ?rffy l/msfmasm f3 Enig?g?ahg? RUN mo Sims H10 WALL TIE DETAIL 18 Ag PORTAL GABLE RAFTERS WALL TIE - DETAIL 19 WALL IIE DETAIL 19 GRID LINE 1, GRIDS T0 LINE 1. GRIDS A TO Games hall These details were not investigated at the time and following further calculations by Russell Miller, there are no remedial works required to these areas 31 fl I. at WEB ??gikn ?man 91le November 2016 WALL TIE DETAIL 4 The wall tie between the 2 skins of block was short on embedment, with embedment confirmed as around 20mm APPENDIX 3 Rectification works November 2016 luau-1hr cm- mm 1.33M mumumaH-J1-u HLHON I. .u mun-ulna? ?unru- aw; ?and-mm: In; 999178 i 3? 9043243? nun-lo ul? why-mu ?Finn Id DUEL suo pa A613 L-un muss Amuyd apuvwoom slooqos ansnoumo r3 Jeyog pun-q "mu-3 551$? MEL mag (H.301 *l?d (3)2330 W.) ?"15 a" JOIKBL Aaswaa amonw vb: 019v ?MP-qu ?mns 29mm Li: [39.161.1an ?wa: W9 1903 6 tom pnbn? pupa 9 Jocp luck: 0 In I wanna gun 5 mm: pm sumac :qpum andumm MM: I?l .(mvru I:an rd up" PRODUCT SHEET HELIFIX SUSTAINABLE STRUCTURAL SOLUTIONS RetroTie A remedial wall tie with a dry/ resin fix AppHcoUons Versatile replacement wall tie - Use where there is hard external brick material 0 Use where random testing is required of the security of ?xing in the inner leaf Features Quick, easy, non-disruptive installation - Effective in all common building materials - Far leaf security of ?xing easily proof tested Remedial wall tie - brick to brick and brick to block Over no standard repair speci?cations are available oniine, covering all common structural faults. Relevant Repair Details: For full Product Information. Case Studies and downloadable Repair Details go to: Injecting resin to complete the RetroTie installation PRODUCT SHEET I. Mark the points for RetroTie insertion on the face of the near leaf brickwork. Drill an 2. Widen the hole. through the near leaf only. to 3. Load the RetroTie into the support tool. 12 mm diameter. Clean the hole in both the insert through the near leaf and drive home appropriate diameter pilot hole through the near and far leaves into the far leaf. The?O' ring marker allows near leaf brick and to the required depth into the cavity width to be measured and avoids the far leaf.The hole should be drilled about over-driving half way up the brick and around 5mm from the end to avoid frogs and core holes 4. Position the plastic sleeve over the outer end 5. Security of ?xing in the far leaf can be tested 6. Inject PolyPlus resin until the hole is ?lled and of the RetroTie and slide it down the tie with with a Helifix Load Test Unit then make good the support too! until the mark on the tool stem is flush with the outer face. The sleeve centres the tie and seals the hole adjacent to the cavity TechmcolSpecmcoUons Material: Austenitic stainless steel Grade 304 (L430l) or 3 I6 ( .440l) Diameter: 8mm (6mm available suitable for timber far leaf) Length: 3M of near leaf thickness cavity width far leaf penetration depending on material, typically 70mm 70mm, 95mm, 220mm, 245mm. 270mm and 295mm in packs of I00 Near leaf thickness cavity width far leaf penetration IOmm Standard Depth of pilot hole: Near Leaf Material Far Leaf Material Near Leaf Pilot! Far Leaf Pilot! Penetration Pull Out Clearance Hole Clearance Hole into far leaf Clay Brick Aircrete 2mm None 75-90mm .0kN Clay Brick Timber Stud I2mm (10mm if 6mm tie) None 55mm .0kN Clay Brick Clay Brick 2mm 5-6mm 70mm 2.0kN Clay Brick Concrete Block I2mm 6mm 70mm 2.0kN Clay Brick Concrete l2mm 6-6.5mm 35mm 2.0kN NOTEAII ?gures quoted are indicative dependent on the exact nature of the substrate.Testing should always be undertaken on site using the Heli?x Load Test Unit Compression Resistance should be checked wida the Heli?x Technical Department. Fixing Density should be calculated by the Heli?x Technical Department Ties should be at 900mm centres horizontally by 450mm vertically. in a staggered pattern, or as specified PolyPlus resin (or HeliBond if required) Minimum ?xing density: Bonding agent (near leaf only): RECOMMENDED TOOLING For drilling pilot hole: For drilling clearance hole: For installing RetroTie: 2i Warple Way. London W3 ORX Tel: 020 8735 5200 Fax: 020 8735 520 email: SUSTAINABLE STRUCTURAL SOLUTIONS April20 3 Rotary percussion 3-iaw-chuck drill SDS hammer drill or rotary percussion drill Power driver or hand held SupportTool . . (.1 I, .- VP n: .54 nrl.w.r.v 2W aw .- r. .. swim; T. . .l WEE. . .II I E. Eil, I. a .1 4.3.14.1. XL Test No 8. 0n dry fixing into inner block M- .. . Test No 12'. On resin 3? QME . {an . (I. Test N0150n resi?' only ?fiJL': - I _1 ._li .. ., i1__ .. . .. 14 .g i? APPENDIX 4 WA Fairhurst Close Out Report FAIRHURST Westerton of Craigie Southampton Road Dundee DD4 7PN engineering solutions, delivering results 3753 El? I ll ?lf 1 31 OCT 2015 TEL: 0I382 453300 FAX: 0844 38 44l2 Email: dundee@fairhurst.co.uk 28 October 2016 Website: Robertson Construction Tayside 4444-94?3 Robertson House 1 George Buckman Drive DUNDEE DD2 3SP Dear Sirs EDINBURGH 115831: FORFAR AND CARNOUSTIE SCHOOLS WOODLAND PRIMARY SCHOOL GLASGOW This letter should be read in conjunction with out Report 115831/dnd/O1 dated 30/06/16. LEEDS LONDON We confirm having reviewed the results of the various investigations and works undertaken and report as follows. MAN ESTER NEWCASTLE SEVEN OAKS The investigations revealed that the wall ties in the area of double skin cavity masonry construction at the Games Hall have insufficient embedment. The embedment into the outer leaf is only 20mm at locations 1, 2 and 5. This is significantly less than the required embedment of 50mm as specified in B85628, Clause 25.2.8. SHEFHELD TAUN TON THURSO WATFORD WESTHILL We therefore concluded that remedial works were required to reinstate the integrity of the wall panels at the Games Hall area. In terms of the scope of the remedial works, we confirm that remedial wall ties have been installed to secure the connection between the outer skin and the internal blockwork. These were installed at 900mm centres horizontally and 450mm centres vertically, staggered. Also, two rows of ties were installed at the head of each panel at 600mm centres horizontally and 225mm centres vertically, staggered. We therefore conclude that the remedial works which have been undertaken have addressed the issues identified in the investigations Yours faithfully Reviewed b- 28 October 2016 Construction Tayside Chairman: SeniarParmcr: Bryson Farmers Connall PA Ridge A Milne Bruce Clay-ton McKay Message McSpadden Scott-Kiddle CA Clark SJ Holmes Lau