H:\2018\0600 - 0699\18-0657\03 let\18-0657_01 - Block Wall Removal.docx

August 30, 2018 18-0657 Humber College

c/o Ivan S. Franko 5359 Dundas St. W., Suite 200 Toronto, ON M9B 1B1

Attention: Edward Uzoma Re: 205 Humber College Blvd., Toronto, ON Bldg.’s E, EX and H - 2nd Floor, Review of Block Wall Removal Dear Edward: As requested our office has reviewed the proposed locations of block wall removal for the new business school renovation at the above referenced address. In our opinion the block walls can be removed without the need for reinforcing. We have based our review on the following observations and recommendations: Observations:

Our office reviewed the base building structural drawings prepared by C.D. Carruthers & Wallace Consultants Limited in 1968, with R.L. Booth being the structural engineer of record. The information from these drawings that was used for our review included:

o The Second Floor Framing Plan (Dwg. S6) indicates that the 2nd Floor is typically constructed of a 2 ½” slab on cellular steel deck supported by steel beams.

o The Sections and Column Schedule Plan (Dwg. S4) indicates that at the location of the proposed removal of Wall 1, the wall is supported by a reinforced concrete upstand beam.

o The Penthouse Roof Framing Plan (Dwg. S10) indicates that at the location of the proposed removal of Wall 2, the wall is laterally restrained at the top by steel braces.

Our office visited the site on August 21, 2018 to confirm existing conditions. Additional Information used from this site visit as part of our review included:

o We were able to observe the concrete upstand beam supporting Wall 1, refer to photo 1. o Wall 2 is concealed behind drywall and we have assumed that it is not supported by a concrete

beam and rests directly on the slab. Steel braces providing lateral support to Wall 2 were observed, refer to photo 2.

o Wall 1 terminates under existing pre-cast T beams at the third floor and there is a deflection gap between the T beams and the wall. Wall 1 is not a load bearing wall, refer to photo 3.

o At the location of Wall 2, third floor framing is supported by a truss and Wall 2 is non-load bearing.

o We observed several steel braces in place where block wall had previously been removed, refer to photo 4.

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Recommendations, refer to SK-S1:

The concrete upstand beam observed on site is supporting the weight of the masonry block wall, Wall 1. The wall and beam may be removed without the need for reinforcing the slab as long as the entire length of block wall supported by the upstand beam is first demolished prior to demolishing the beam.

The masonry block wall, Wall 2 is supported on the slab only and can be removed without reinforcing the slab.

Following the removal of Wall 2, steel braces can be demolished. We trust the above is sufficient for your present needs. Please call if you have any questions. Regards, Engineering Link Incorporated

Per: Michael Moleski, P.Eng. Senior Engineer T: 416 599 5465 x123 E: michael.m@englink.ca

Attached: Sketch SK-S1 Sent: To: Edward Uzoma Edward@ifranko.com

205 Humber College Blvd., Toronto, ON August 30, 2018

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Photo 1: Wall 1 Supported on Concrete Upstand Beam

Photo 2: Wall 2

Steel brace

Wall 1

Concrete upstand beam

Wall 2 concealed by drywall

205 Humber College Blvd., Toronto, ON August 30, 2018

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Photo 3: Deflection Gap at Top of Wall 1

Photo 4: Steel Brace for Previously Demolished Block Wall

Deflection Gap

Wall 1

Pre-cast T beam

Steel Brace

Project:

205 Humber College Blvd., TORONTO, ON Bldg.’s E, EX and H - 2

nd Floor, Review of Block Wall Removal

Project No:

18-0657

No:

SK-S1 Page 1 of 1

Subject:

PARTIAL SECOND FLOOR FRAMING PLAN

Date:

August 30, 2018

Scale:

N/A

READ THIS SKETCH IN CONJUNCTION WITH STRUCTURAL DRAWINGS AND OTHER CONTRACT DOCUMENTS