APPENDIX 2a RCT intrusive survey report 0 Report/Photographs Marked up Drawings November 2016 ROBERTSON Aftercare Progress Report Progress Report August?l? Forfar/Carnoustie School inspections Whitehills Primary School Following the visual inspections and Fairhurst report it was requested that further investigations take place at all schools within the scope of works to satisfy Angus Council and Goodson Associates that the structure has been built as intended and concerns of structure failure were removed from the equation. Arrangements were made to carry out the investigations on 20/08/16 21/08/16. The investigation took place at 4no locations on various elevations externally and lno internally within the games hall. Head Restraints The engineers drawing identifies the requirement for head restraints at various locations and can con?rm that during our investigation, no head restraints were identi?ed as being installed Bed reinforcing This was not investigated as the games hall walls are 215mm thick made up of 2x 100mm concrete block tied together over the width of the wall which is then tied to the outer leaf of block over the width of the cavity, and there is no evidence of bed reinforcing being required here. Wall ties These were found to be at regular intervals wherever exposed during the investigations with an average embedment of 50mm, although at one location the embedment depth was only sitting at 36m. Page 1 of 2 Angus council was represented over the two days, with-0n 20/08/16 and on 21/08/16 in attendance. aphs have been taken and marked up drawings have been sent to of Fairhurst for comment and a meeting has been arranged for 24/08/16 at Fairhurst HQ to discuss our ?ndings. Page 2 0f2 7' 1665th 1- Location 1. Wall tie I Looking left 31001 '11- um?- dn Bun" 5 '4 fury 45"? . m. ?twin?H -. Location 2 Walltie with 50mm embedment -. Location 2. Looking right {41? a' kin-'tat: 1.4" Li . arr Somme: w. man: 38 Ema 9a 333 1?senea an ?em 'gaI Bumom '7 hall. No evidence was found of ead re? l: .. .1 . NHL. Hall?- - . - lug-m nu I ILLI- I I. nu; mun us If" un?t. GROUND FLOOR PLAN ISSUE ?Uvunrll ROBERTSON Mackie Ramsay Taylor Chartered Architects 47 Victoria Street, AberdeenI A310 IQA Telephone (0122-1) 639195 Fax {01224) 632955 E-mail Meat Foriar 8: Carnouslie Schools Mileh'zlls Primary School mm: Proposed Plans on. Jan 2006 Dun-q 9:205 01 IOU 5! 5%er 5m uonamlsuoo :snms A rhea Lotozl'l r?uwaJa 8d sumauum :JaaEmd pmea Ham 09:0er 9 Luz-Q-zz 4" panama mama uoadynsau 3?00 ?8 10/7071? 30013 15313 ?2 :5 1m XHOMMOO-IB anlgg ?nn?uzcaJcs om ?mm mm HVJHOJ "13. WOOHOS $7m? 3H iSElL-l 1V A-ATIIVBCI Elli TIVM WVEIEI ?xx?31:91?; ~53? T71- 739': A08 3d?. {mm TIVM N03NV 'l I 0'33 N0 N31 331110 Ill-1001 _-Iv3?1 33mm xolm waLZ :4 2? u: f: "4??er Qfg?Zi Etna-131k 3. f" '1 LL arr,? - - *1 g, 1 item; .- 4 - T. T. MLEI. Wf TE -1 .-. .W X-X TIVOICIM 4 I 3m aaino xoml wwom on?Hvs 3cm 3n mm NOONV 3?13"] HHNNI L531?"?th ur? APPENDIX 2b Variations from design ANCOH WALL IIE - l?rPE 215mm THICK LEAF TYPICAL BLOCKWORK RESTRAINT AT ROOF STEELWORK .I 100mm GUIER 0H FRID LIKE mm The above head restraint detail was not found at this location during the investigation Location 3 Wall tie where block has been? removed' and inner block built into web Above photograph shovving internal beam on its flat with block built into web. Beam is acting as a head restraint. Photo also shows the inner block being tied to the outer, however photograph below highlights that the embedment of the tie is short. November 2016 APPENDIX 3 Rectification works November 2016 12-10-2016 14:20:03 Weir, David Project: WhItehiils PS Drawing: Rev: Status: Construction This drawing is nottc scale Mum P2 ?5541100? ?0an Crack stitching rods installed here PRODUCT SHEET PSICSOI HELIFIX SUSTAINABLE STRUCTURAL SOLUTIONS Crock Stitching A reliable and cost-effective means of repairing and stabilising cracked masonry Apphconons - Rapid and permanent solution to cracked masonry - Suitable for all forms of masonry structure Features - Fully concealed. non-disruptive repair solution - More reliable than crack iniection methods - HeliBond cementitious grout is injectable and rapidly produces high compressive strength HeliBars and HeliBond grout combine to create excellent tensile strength within the masonry - No additional stresses are introduced during installation - Masonry remains ?exible enough to accommodate normal building movement - Tensile loads are redistributed - Reduces likelihood of further cracking nearby - Avoids costly and disruptive taking down and rebuilding Over IOU standard repair speci?cations are available online,coverlng all common structural faults. Relevant Repair Details: RDs CSOI to CSI 4 For full Product Information, Case Studies and downloadable Repair Details go to: HeliBar is inserted into HeliBond grout within a cut slot PRODUCT SHEET PSICSOI installation Procedures I. Rake out or cut slots Into the 4. Using the HeliBar Insertion Tool. . . horizontal mortar beds. a minimum push one HeliBar into the grout to - HeliBar to be long enough to eXtend a mm'mum 0f of 500mm either side of the crack obtain good coverage 500mm either side of the crack or 500mm beyond the outer cracks if two or more adjacent cracks are being stitched using one rod. 2. Where a crack is less than 500mm from the end of a wall or an Opening, the HeliBar is to be continued for at least 200mm around the corner and bonded into the adjoining wall or bent baCl< and into the reveal, 2. Clean out slots and ?ush with clean 5. Insert a further bead of HeliBond avoiding any DPQ water and thoroughly soak the over the exposed HeliBar.finishing substrate within the slot 2mm from the face.and ?iron' 3. For solid masonry in excess of 300mm thick and in a ?rmly into the slot using the cavity wall where both leaves are cracked, the wall must He'lB" '?ser?mn T??l be crack stitched on both sides. 4. If there is render, this thickness must be added to the depth of slot. Crack stitching must be installed in the masonry and never in the render. 5. Ensure the masonry is well wetted or primed to prevent premature drying of the HeliBond due to rapid 3. Using the Heli?x Pointing Gun. 6. Re-point the mortar bed and make de-watering. especially in hot conditions. ideally inject a head of HeliBond along the good the vertical crack with back of the slot CrackBond TE3 additional wetting of the slot should be carried out I to 2 minutes prior to injecting the HeliBond grout. Slot Depth and Spacing 6. Do not use HeliBond when the air temperature is and falling or apply over ice. In all instances the . . . Single Solid Masonry slot must be thoroughly damp or primed prior to skin i injection of the HeliBond grout. Cavity Up to l02.5mm wall l02.5mm to 225mm Over 225mm . Depth of slot 25 35mm 25 40 mm 25 40mm Onbothsides fl 8 Vertical Spacing Every 4 6 courses.300 ~450mm Material: Austenitic stainless steel Grade 304 (I.430l) or 3 6 (I .440I) Diameter: 6mm (or 4.5mm for thin mortar joints) Tensile strength (6mm HeliBar): l0 kN 0.2% Proof stress (6mm HeliBar): 900 Nlmm2 Length: To extend 500mm either side of the crack or outer cracks, if more than one Standard lm. l.5m and 2m in packs of IO. May be cut to length on site Height of slot: Full height of mortar bed or approx. 0mm if cut through the masonry unit Bonding agent: HeliBond cementitious grout. I 3 tr HeliBond IO linear metres of crack stitching RECOMMENDED TOOLING For cutting slot up to 40mm deep: Twin-bladed cutter with vacuum attachment or angle grinder or hammer and mortar chisei For mixing HeliBond grout: 3-iaw-chuck drill with mixing paddle For inlection of HeliBond into slots: Heli?x Pointing Gun CS with mortar nozzle For smoothing pointing: Standard finger trowel For inserting HeliBar: HeliBar Insertion Tool The Mille, Great West Road. Brentford, London TW8 9DW Tel: 020 8735 57.00 Fax: 020 8735 520! - email: SUSTAINABLE STRUCTURAL SOLUTIONS Amman 12-10-2018 13:37:47 Welr. David Pro]ec1: PS Drav?ng: Ray: Stains: (C) This drawing ls not to some straps fitted here PLANT (1245qm) Stalr 03 FEMALE STAFF WC . (16 sqm) Ref- WORKBASE (12 sqm) I Ref 015 (8) STAFF ROOM (45 sqm) Ref - 014 TUTORIAL 15 SF (205qm005.1 1/1 CLWBA fif??. DEM. bC?agg airman mun g-Mb 5353 A2 54.33 5050 Didgw" ?10me I 135.9:wa - /-bTeaL 3 P5 Webmcam 09184-ch - DETAIL 11 Hthl?l How?l f-?nhC-Ikml-L?s bo??b?r ij??ro c?c?w'r 61.301 1 FM 5 "30 EWEDL I W3 O?qlv-. 1 I DETAIL 15 DEFAJL 15 DETAIL 17 9 (SIMILAR) I I . Project: Wagq We mg, I Title: F5 Status: Scale: PM Room. 237% Date: Drawn: Checked: Sketch No: H583 3&2) Revision: 6313 1.995? 1n .I. 12-10-201 6 13:47:57 Weir. David Project Thomas Street PS Drawing: Rev: Status: Dorm-notion (C) This drawing is nottosmle Roof over Piant Room and part Kitchen wing raised 700mm eme la IeSInsa WI In lg lg area Kitchen wing extended to provide accommodation for sprinkier valve set and electrical meter and distribution board PRODUCT SHEET DryFix Dry mechanical pinning and remedial tying system Over I00 standard repair speci?cations are available online, covering all common structural faults. Relevant Repair Details: RDs LR04 WTI6 For full Product Information. Case Studies and downloadable Repair Details go to: SUSTAINABLE STRUCTURAL SOLUTIONS AppHcoUons Versatile replacement wall tie For securing multiple layers of masonry For pinning delicate masonry features Features Requires no resin. grout or mechanical expansion - Quick, easy, non-disruptive installation using the Power Driver Attachment - Installed tie is recessed below face of masonry Highly economical with low installed costs Effective in all common building materials - Leaves masonry virtually unmarked - Usable in all weather, temperature and environmental conditions - Far leaf security of ?xing easily proof tested Dryle tie being power-driven into pilot hole PRODUCT SHEET lnstoHc?jon Procedures I. Mark the position for the DryFix tie on the face of the near leaf. 1. Drill small pilot hole using rotary percussion drill. Haw-chuck type . . . . "in: 0? 3. Fit the spatial DryFIx PDA Insertion tool - to an electric hammer drill (SDS EYPE). 2. Load tie into DryFix Power Driver Attachment ?tted to SDS hammer drill 2. Drill an appropriate diameter pilot hole (depending on density of far leaf material) through the near leaf and into the back-up substrate, to predetermined depth, using a rotary percussion drill (3-iaw-chuck-type). '2 4. Load the DryFix tie into the insertion tool. 5. Power-drive the tie into position until its outer end is recessed below the face of the near leaf by the insertion tool. 6. Make good the entry hole with matching 3. Drive in tie until OUter end is fully recessed below face of masonry materIals. TecmucolSpecmcouons Material: Austenitic stainless steel Grade 304 (l .430l) or 3 6 (l.440 ) Diameter: 8mm (IOmm available) Length: Near leaf thickness cavity width required penetration into the far leaf less required penetration of the PDA Standard l70mm. l95mm, 220mm, 245mm. 270mm, 295mm,325mm and 350mm in boxes of 00 Depth of pilot hole: Length of DryFix 25mm Near Leaf Material Far Leaf Material Near Leaf Pilot! Far Leaf Pilot! Penetration Pull Out Clearance Hole Clearance Hole into far leaf (Proof Load) Clay Brick Aircrete 5-6mm None 75-90mm .0kN Clay Brick Timber Stud 5-6mm None 55mm .2kN Clay Brick Clay Brick 5-6mm 5-6mm 70mm 2.0kN Clay Brick Concrete Block 6mm 6mm 70mm 2.0kN Clay Brick Concrete 6mm 6-6.5mm (very hard concrete 35mm 2.0kN may require an Asymmetric tie) NOTEAII ?gures quoted are indicative dependent on the exact nature of the substrate.Testing should always be undertaken on site using the Helifix Load Test Unit. Compression Resistance should be checked with the HelifixTechnical Department. Fixing Density should be calculated by the Heli?xTechnical Department Minimum ?xing density: In accordance with project speci?cation or check with HelifixTechnical Department Bonding agent: None required RECOMM EN DEDTOOLING For drilling pilot hole: Rotary percussion 3-iaw-chuck drill For installing DryFix tie: Power Driver Attachment fitted to an electric hammer drill (SDS type). The Mille. GreatWest Road. Brentford. London TW8 9DW Tel:020 8735 5200 - Fax: 020 8735 520i - email: SUSTAINABLE STRUCTURAL SOLUTIONS Apn 20l4 APPENDIX 4 WA Fairhurst Close Out Report engineering solutions, delivering results FAI RH RST Westerton of Craigie Southampton Road Dundee DD4 7PN TEL: 0l382 453300 FAX: 0844 Mt 44l2 Emaii: dundee@fairhurst.co.uk Website: mvw?tlrhurstcouk 16 November 2016 Robertson Construction Tayside Robertson House 1 George Buckman Drive DUNDEE DD2 38F Dear Sll's tolunuaon ELGIN 115831: FORFAR AND CARNOUSTIE SCHOOLS WHITEHILLS PRIMARY SCHOOL meow INVEHNESS This letter should be read in conjunction with our Report 115831/dndl01 dated We confirm having reviewed the results of the various investigations and works undertaken ?3m? and report as follows. SEVENUAKS The design philosophy for the wall panels at the Games Hall is that they span horizontally with support provided to the ends of panels by columns and wind posts. The blockwork is exposed to the wind and extends to roof level at the gable but the elevation walls are mainly sheltered by having lower sections of building abutting. At the gables a wall head restraint mm is required at the top of the panels. At the elevation walls support is provided by a ?mu horizontal steel beam on its side. with the blockwork built into this. There is no design requirement for structural wall reinforcement in the beds. SHEFFIELD TAUNTON THURSO Wail tie embedment into cavity wall construction: Location 1 (gable) 50mm Location 2 (gable) 50mm Location 3 (elevation high level) 36mm ?xed to steel The investigations have revealed that the wall ties at the gable walls have adequate embedment in accordance with 885628, Clause 25.2.6 and are generally properly installed and in our opinion the structural integrity of the outer leaf is acceptable. However. the wall ties at the upper sections of the elevation walls, which are ?xed to the steel work, do not have adequate embedment. This section of wall has had remedial wall ties installed to secure the connection between the outer skin and the internal blockwork. These were installed at 900mm centres horizontally and are shown on the remedial works Record Photographs enclosed. The investigations undertaken have revealed that the wall head restraint at the gables is missing. We have undertaken a design check on the panels without the head restraint. This shows that the smaller panels, less than approx. 3m wide are satisfactory without the head restraint detail. At the Games Hall there is only one panel which is wider than 3m and this has a window at the upper area. hence a head restraint detail is not appropriate. At the Plant Room there is one panel which is 3.4m wide. A head restraint detail, as specified on 115831 -Sk3 has been installed. Page 1 of 4 animal-u ilBH:Cra:lun Sandman-er Rqun Partnm: AIComcil ?Peder: FAnge ARHilne GLBruce lMcKay ?than? AJScott-Kiddie SlHnimu luu FAIRHURST 16 November 2016 Our original Report 115831/dnd/01 highlighted cracking in the external wall at the corner adjacent to stair 01. Robertson have undertaken repair works in this area involving inserting Helifix stainless steel repair rods in bed joints. Robertson have undertaken to monitor this area as part of their maintenance procedures. We therefore conclude that the remedial works which have been undertaken have addressed the issues identified in the investigations Yours faithfully Project Engineer Enc.l Record Photographs 115831-Sk3 Reviewed by -15 November 2016 Construction Tayslde Page 2 of 4 115831: FORFAR AND CARNOUSTIE SCHOOLS - WHITEHILLS PRIMARY SCHOOL Remedial Works Record Photographs taken 12 October 2016 ?We? few . -, Remedial Straps in Plant Room Remedial Wall Tles at Upper Wall Page 3 of 4 115831: FORFAR AND CARNOUSTIE SCHOOLS WHITEHILLS PRIMARY SCHOOL Remedial Wall Ties at Upper Wall Page 4 Of 4 0%u? 3.13% ?7 QC: 5050 5 57mm 3&an DEDML 11 IrHLfi?t Pm) I 530?? Awo?vag LorrHr 5x40 W3 DEBML 15 DETAIL 9 (SIMILAR) 6813 FAIRHURST Project: mama; We mg Title: WHEHILLS F3 Status: Scan? PM Room 53% Date: PENN: Drawn: Checked: Sketch No: ?583? 3&5 Revision: i din) LQEE II a? 1n