0 ROBERTSON Whitehills Primary School Forfar/Carnoustie Schools Outcome of Structural Investigations Summary Report November 2016 - Introduction 0 Appendix 1a 0 Appendix 1b 0 Appendix 23 0 Appendix 2b 0 Appendix 3 0 Appendix 4 Index Goodson Associates visual inspection report W.A. Fairhurst visual inspection report RCT Intrusive Survey Report Variations from Design Rectification Works W.A.Fairhurst Final Report November 2016 Parties involved throughout the investigations and their responsibilities are detailed below: Elgin Education Trusted Partner for Forfar/Carnoustie Schools IIVI Infrastructure Management for Forfar /Carnoustie Schools Robertson Construction Eastern Main Contractor for the construction of the Forfar/Carnoustie schools. Robertson Construction Tayside- Responsible for carrying out visual Intrusive surveys and organising and management of remedial works WA Fairhurst Project Engineers for the Construction of Forfar/Carnoustie Schools Responsible for carrying out visual inspections and identifying any remedial works to be carried out, and to ensure the works are carried out to their satisfaction and schools are safe for use thereafter. Goodson Associates Initial independent engineers for Robertson Construction to carry out visual inspection, and later appointed by IIVIL to act as independent engineers during the investigations Report on Visual and Structural Findings Whitehills P.S. Forfar 1. Introduction Following on from the structural faults found on the Edinburgh Schools Project earlier this year that identified various issues with Head Restraint Ties, Wall Ties and Bed Reinforcing, 7 schools within the Forfa r/Ca rnoustie PFI contract were surveyed to establish that the construction met the design criteria. The schools investigated were of steel/concrete framed structures with an external envelope of "non~load bearing? walls. in these schools, cavity masonry construction is primarily limited to games halls, with timber/metal stud framing used elsewhere such as the accommodation wings. In line with the initial information from the Edinburgh Schools investigation, investigations focused on these areas of cavity masonry wall construction and the interaction of wall panels with the principal structural frame. The report detailed below is for Whitehills Primary School. (Opened 2008) 2. Visual Inspections Robertson Construction (Tayside) appointed Goodson Associates to carry out visual inspections to identify any potential concerns regarding the stability of external walls. The inspection identified minor cracking to mortar beds on all elevations, with some evidence of cracking to render panels. Following on from the initial visual inspection by Goodson Associates, arrangements were made to carry out a further visual inspection with the original contract engineers (W.A.Fairhurst Partners) to further identify any potential signs of structural failures, and this report is included within this document. During the visual inspections carried out by W.A.Fairhurst, there was one area identified as requiring some remedial works done. This involved inserting Helifix Crack stitching rod at one low level external corner, located below one of the pupils toilet windows. Following on from these visual inspections, the decision was made to carry an intrusive survey, and investigations were arranged to be carried out on 20/08/16 21/08/16. The investigation took place externally at random locations over various elevations. Appendix 1a Goodson Associates visual report a Report - Marked up drawings 0 Photographs Appendix 1b W.A.Fairhurst Partners visual report 0 Report a Design Drawings 3. Intrusive Survey 8: Findings During the investigations it was evident that in certain areas, the structure was not built in line with the original design. Photos and marked up drawings of our findings, were issued to W.A Fairhurst for review. As Goodson Associates were originally appointed by RCTL on the initial inspections, IML, then appointed them on behalf of themselves and Elgin Education to support the information being issued. This was practical, as they were already familiar with the schools to be inspected. Throughout the investigation-of Goodson Associates, was issued with the evidence from the investigation for comment and subsequent questions were answered by? In addition, during these investigations fAngus Council was in attendance on 20/08/16 an_of Angus Council was in attendance on 21/08/16 Our findings and variations from construction drawings are included in Appendix 23 RCT intrusive survey report Report/Photographs - Marked updrawings Appendix 2b Variations from design Head Restraints The head restraint detail identified for both gable ends of the games hall on Fairhurst Drawing No 60299-53-271 was not found at the time of the intrusive survey and deemed not to be installed, as there was no evidence of these being fitted. On the two long elevations of the games hall the internal steel beam lies on it flat with the block work built into the web of the beam, which acts as a head restraint. There was evidence of the outer leaf being tied at this location however the embedment of ties were found to be short at only 36mm. Bed reinforcing Internal walls are constructed with Zno skins of 100mm block tied together to achieve a 215mm thick wall, therefore bed reinforcing is not required. Wall ties Various areas were investigated and the findings were as follows: Where wall ties were exposed at the various locations, embedment was confirmed to be an average of 50mm, with the exclusion of the location noted above in the head restraint section 4. Remedial actions Reports were forwarded to Fairhursts and calculations were checked, along with a further visit to site, to carry out another survey to confirm remedial work details. Following the recalculations, details were issued to all parties and confirmed as acceptable prior to works commencing. The extent of works involved were mainly restraint straps installed at agreed locations within the plant room area along with some Helifix (dryfix) remedial ties along the single elevation of the games hall where tie embedment was found to be 36mm Details of rectification works are detailed within Appendix 3 with W.A Fairhurst?s final completion report included in Appendix 4 5. Conclusion All remedial works have been carried out and signed off to the satisfaction of our structural engineer, which concludes the investigation at Whitehills Primary School, with no further action required. David Weir (Robertson) November 2016 Please see below sign off below from all relevant parties involved throughout the investigations, and confirmation that all information included within this document, is an accurate account of the findings during the visual inspections, and that all remedial works have been carried out in accordance with the engineers recommendations and details Principal Contractor (Robertson Construction) Project Engineer (W.A.Fairhurst Partners) On Behalf Robertson Construction Ta side Signed by ftercare Manager Authorised by .. Managing Director On Behalf of W.A.Fairhurst Partners Approved by .. -Project Engineer) APPENDIX 1a Goodson Associates Visual inspection report 0 Report 0 Marked up Drawings 0 Photographs Commerce House tei +44 (0)1224 624 749 Commerce Street web Aberdeen A1311 SFN email . also at Edinburgh, Glasgow at Leeds . - i.Ialese?sepeeaiwnF Ila-same Robertson Construction Tayside I George Buckman Drive DUNDEE 04 May Angus DD2 38F Dear Doug Masonry Review of Angus Schools We refer to the above and following your instructions, con?rm having visited the following schools in your presence over a period between Wednesday l3th and Friday l5th April 20l6. The purpose of our presence was to offer advice, when requested, during your walk around the schools with a view to identifying any areas of concern which would require further in depth investigation. Burnside Primary School, Thomas Street, Carnoustie DD7 7JZ Carlogie House. Carlogie Primary School, Caesar Avenue. Carnoustie DD7 6DS Carlogie Primary. Caesar Avenue. Carnoustie 608 Carnoustie High. Shanweil Road, Carnouatie DD7 78$ Langlands Primary School; Glamis Road. Forfar DDS IJY Strathmore Formerly Kirkriggs Primary, Strathmore Primary School, Stjames Road, Forfar DD8 Whitehills Primary School. Fyfe Street, Forfar DDS 3EQ Woodlands Primary School. Queen Street, Carnoustie DD7 7SU The outcome of your initial survey highlighted two schools which were identi?ed for further investigation. Based on the selected drawings and photographs provided, we comment as follows: Carnoustie High. Carnoustie in view of the cracking indicated at the high level areas, intrusive investigations should take place to con?rm the wall tie condition and level of embedment. This should extend to any lower levels following the outcome of the high level investigations. I 12m is the name oi GEM-2300 anaemia; Untied. consul-My engineering nmiromnt Lanite-i Cempan?; in Saunas-J No. Robertson Construction Tayside 4 May 20 6 The remaining schools on the survey list also have cracking, the majority of which would appear to be due to shrinkage. insuf?cient expansion joints and possibly a lack of bed joint reinforcement. HoweVer, it would be prudent to select areas in each of the remaining schools which have smaller cracks and carry out random intrusive works. These works may result in confirming the level of any maintenance required over a prolonged period. Please nete that this approach only addresses the existing wall ties and embedment at high levels in an attempt to reduce or remove the possibility of uncontrolled collapse of any wall panels around each school building. Yours sincerely Regional Director -. 19?: a rm . r. NOTES Uulldirrg crassl?carlm "Murmur WINDOWS IPSCREENS ROOFUGHTS Master powder coated alumlntum ?arr-10th:, semen; and tn acltleve 2.29!!le - All glam helm-J Edam-n wave FFL tn ht: In safut'r 91m to IE 6152 All internal screens to be hardwood with pendl rounded fath For and wlreru required with tummy I?nr tut certl?catlon to saw? local Control. Fire mutant glass huddled i1 Inhamesutn'.? mule. Chis to re?ect ?re resistance at area as rcqulrorl. DOOR-5 All new external door: to the pravidr: Irrch awn-55 ban-rd- free thresholds to all doors 1m lm'rtl plan human mammal! In front at all dour: INTERNAL DOORS All duarms to be Baum Meddimrn sand cure doors, MUF matted faring: the 11er um rm [where required} to slash} the Intel Building ControL All ?uted behave rnmnuutar meet requirements or Bulldan Reqtrlarrans Rn: glass hurled ln mull-hum: mastic: EXFERNN. WELL CONSTRUCTION mumm duck mm In:th alum clad tullh Rand tenderer rm;an landmark. 5.0mm wide mow, tlmber Itlt Inner wan campnsing: bread-tr manna. 9mm thick 058, 1-15 wldu tlmbu frame In?llcd \vlth an value 0.30 and clad 1.1mm tutti: Durallne wallhaard. malnlu: wall ua ?xed at centres to manutamm Main Hall walls In 100 thick oumr Icahn hlodtwork clad Rand or learn; hlackwork. 50mm wlde WIN. 75mm lnsulatlnn athlqu value 030 and 215 ml: mm rn two mun-rm Imam-.5 lnner rulrrn ran raced paint quality blackwaltt, minus; sum! wall ?as at ?nuns manuratwre?rs Feature: panda dad cedar ml ?r?an MKTUML VENTILATION All wlndaws to have mung arua ornt least or the ?rm area of the room It serves. Pmnavants to all In prculde a trickle ventilatlnn nfatlmt dear-rm! fur cad: square man at llucr ma. TOILET PROVISION To?eusnowcr mutt uve at The Education [School Prim-nuts.) Regulations 1999 and National Car: Standards [for early cdumdnn and up to the age at 1.5). statle amt-bran rean the requh?emmts atrhe Standards tsmdand] mulauans Jul dimenan to hemmed on an: mar to at work and War he manufade or :ompunants and any amenarmr normed tn the Immedlamv Ml new 5w etc to be dated mmnaum treatment at member yard any a cabaret! westwath IeCrImlnol or gr: malted on and rm ?ows In concrete to Enalrreers deslorr and llama ready tn amt?mr Main Hall to have Spam Flnor 1250mm wlde dil?mm thick War floor lrrsulatlan amuan ant-r at buuzhnn r?M Proposed Plans FIRST FLOOR PLAN GROUND FLOOR PLAN Mw?mwz 2 (Q ROBERTSON ?ll? meh Iowa-l )Imm mull-now I xnm? mm: In can: ll 13:? m? all? L- In una- um stem nus- am Mackie Ramsay Taylor Chartered Architects 4? Vldu?a Street, Aberdeen. N310 IQA Telephone (013.24) 3935 F31 {man} 9356 email mall?mrtmantammn aqua Foriar 8: Carnoustie Schools Whitehllis 1 Primary School tuna-w if" 1m. aw:- i nut-tru- 2006 i ll - I 5' "ll-RI! mmlh. I 1346 u?qaugj? APPENDIX 1b W.A Fairhurst Partners Visual inspection report 0 Report 0 Design Drawings Robertson Construction Tayside Investigation of Blockwork External Leaf, Forfar 8: Carnoustie Schools Survey Report June 2016 Investigation of Blockwork External Leaf, Forfar Camoualie Schools Survey Report FAI RST i CONTROL SHEET CLIENT: Robertson Construction Tayside PROJECT TITLE: Investigation of Blockwork External Leaf, Forfar Carnoustie Schools REPORT TITLE: Survey Report PROJECT REFERENCE: 115831 DOCUMENT NUMBER: ISSUE 1 :3 Name Signature Date 3 2 Prepared by - 30/06/16 c. 2- Checked by 30/06/16 06 0 3 Rev. Date Status Description Signature 33! 8 '1 Checked 0 I: Approved .9 a: By a: 2 Checked Approved This document has been prepared in accordance with procedure OPIPOZ of the Fairhurst Quality and Environmental Management System - of Blockwark External Leatdoc Investigation of Blockwork External Leaf. Forfar 8i Carnoustie Schools Survey Report FAIRHURST Contents 1.0 Introduction 1 2.0 Whitehills Primary SchooI,Forfar 2 2.1. Introduction 2 2.2. Inspection 2 2.3. Robertson's Inspection Report 4 2.4. Conclusion 4 3.0 Strathmore 5 3.1. Introduction 5 32. Inspection 5 3.3. Report 5 3.4. Conclusion 5 4.0 Langlands 6 4.1. Introduction 6 4.2. Inspection 6 4.3. Report 7 4.4. Conclusion 7 5.0 Carnoustie High Schoo ,Carnoustie 8 5.1. Introduction 8 5.2. Inspection 8 5.3. Robertson's Inspection Report 10 5.4. Conclusion 10 6.0 Woodlands Carnoustie 11 6.1. Introduction 11 6.2. Inspection 11 6.3. Robertson's Inspection Report 11 6.4. Conclusion 11 7.0 Burnside 12 7.1. Introduction 12 7.2. Inspection 12 7.3. Robertson's Inspection Report 13 7.4. Conclusion 13 8.0 Carlogle Primary School. Carnoustie 14 8.1. Introduction 14 8.2. Inspection 14 8.3. Conclusion 14 Appendix A Inspection Report - Whitehiils Primary School, Forfar Appendix Inspection Report - Strath more Primary School, Forfar Appendix Inspection Report - Langlands Primary School, Forfar Appendix - Inspection Report - Carnoustie High School. Carnoustie Appendix Inspection Report - Woodlands Primary School, Carnoustie Appendix Inspection Report Burnside Primary School. Carnoustie of Blockwork External Leaf.doc Investigation of Blockwork External Leaf, Forfar 8. Carnoustie Schools Survey Report 5 FAIRHURST i 1.0 introduction 1.1 The purpose of this investigation is to check the external skin of blockwork at the Forfar and Carnoustie Schools listed below, with particular reference to possible defects arising from de?ciencies in the wall ties. Whitehiils Primary School, Forfar Strathmore (Kirkriggs) Primary School, Forfar Langlands Primary School, Forfar Carnoustie High School, Carnoustie Woodlands Primary School, Carnoustie Burnside (Thomas St) Primary School, Carnoustie Carlogie Primary School, Carnoustie 1.2 The ins ections were undertaken by w. on 22 June 2018 with- and of Robertson Construction Tayside in attendance. 1.3 Please note that this report is based on an inspection made by Fairhurst during which we did not remove any finishes and is based on a visual check of the structural elements where readily accessible. Problems of timber infestation, fungal decay, damp and asbestos are outwith the scope of this report. This report has been prepared for the sole and exclusive use of Robertson Construction Tayside in response to their particular instructions. Any other party using the information contained within this report for any purpose whatsoever, do so at their own risk and any duty to care to that party is excluded. 1.4 We have been advised that Robertson Construction Tayside has undertaken inspections of the schools. A copy of the InSpection Reports for these investigations is included within the Appendices. We have overmarked these drawings with notes from our survey on 22 June 2016. of Btockwork External Leaf.doc 1 Investigation of BlockWork External Leaf. Forfar 8: Carnoustie Schools Survey Report .. EAI RH RST I 2.0 Whitehills Primary School, Forfar 2.1. Introduction This school is mainly two storey. The two storey areas and the Games Hall are steel frame construction. The single storey areas are timber frame. The external finishes are facing block and render. 2.2. Inspection The external walls were generally found to be in good order. The alignment of the walls was noted to be good. Minor cracking following joints in the blockwork was noted. typically below and above windows. The location of these cracks has been annotated in red on the Record Plan at Appendix A. Cracking below window Cracking at door lintel Cracking above window of Bloc kwork External Leatdoc 2 Investigation of Blockwork External Leaf, Foriar 8t. Camoustie Schools Survey Report Stepped cracking was noted below the two windows at the toilets adjacent to Stair 01. Cracking was also noted extending round the corner here. Cracking extending round corner of Blockwork External Leatdm: Investigation of Blockwork External Leaf, Forfar a. Carnoustie Schools Survey Report . A The panels of render were generally in good order. Within the games hall the blockwork was generally in good order. Vertical cracking was noted in the corners at the upper part of the walls. Vertical crack in corner Vertical crack in corner and stepped crack adjacent 2.3. Robertson?s Inspection Report The inspection undertaken by Robertson did not identify any defects. No intrusive investigations were undertaken. A copy of the Inspection Record is included at Appendix A. 2.4. Conclusion The majority of the defects noted are typical of shrinkage of the concrete blockwork. None of the defects noted are indicative of possible problems with either wall ties or the stability of the outer leaf. The only area of concern noted is the external wall at the toilets adjacent to Stair 01. The cracking pattern here is indicative of minor settlement having occurred. We recommend that the internal rooms in this area be checked for signs of settlement. It may be that the defects can be repaired by using crack stitching in the joints at the outer leaf. of Blockwork External Leaf.doc 4 Investigation of Blockwork External Leaf. Forfar 8. Carnoustie Schools Survey Report EMBS Appendix A Inspection Report Whitehills Primary School, Forfar of Blockwork External Leatdoc JW VUAUS NOTES . Budding animation 1mm?! Building" SCREENS HDF penal rounded bangs hwan and when: rum-Ed ?In meta-2w ?re msnmoiluundod I tuna-oi. AI glued mum? numb-mum mum arw?m Ema: mm: EXTERNAL WALL common Ilium ml h?nd?l? mm artaang mm 75mm mId: I1an ?amnjoan?nsmuwahdm hm 1m mm mm Whamummuxm up to HI: age of [51 mum when: no mun-1mm dale Human mamas [5mm Mwla?ms nun-Idean mewmm lumeth A?nwmetzmbemby orbramlomadmmlemwm nrqlaapp?ualonsin bulldan [Mm?saw 0% Jam"? FIRST FLOOR PLAN 3 Vamch am MD KNEW .I I ran. a.ng cora'huc'nomm ?69 311% clack, Mm A1001. (Sic.ch AT CZFK Ch m1 DH 1 ML swarm a?eld pg? 119 awry-1516?. CEAUL - MERTSM Mackle Ramsay Taylor Chartered Architects 47 mm Strut. Aberdeen, M10 IQA Telephone {01224) 639295 Fax (01221163756 unall ct: Pm mic,_ a? 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