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Home My WebLink Aboutr2021-10-4 Addendum 1 Executive Summary DBV.pdfKHATRI INTERNATIONAL, INC. Page 1 of 2 STRUCTURAL & CIVIL ENGINEERS DIAMOND BAR VILLAGE HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 September 22, 2021 6440 Sky Pointe Dr., #140-299, Las Vegas, NV 89131 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830; FAX (702) 441-7356 ____________________________________________________________________________________________ MEMORANDUM 2021-10-4 STRUCTURAL OBSERVATION REPORT EXECUTIVE SUMMARY ADDENDUM #1 STRUCTURAL OBSERVATION DATE: September 17, 2021 SITE ADDRESS: 23601 thru 23665 Golden Springs Dr, Diamond Bar CA, 91765 CLIENT: DIAMOND BAR VILLAGE HOA Attn.: Ms. Yvette Marie Allen, CMCA Certified Community Manager The Avalon Management Group, Inc., AAMC Office: 909-396-8000 Mobile: 951-239-6192 Email: yvette@avalonweb.com ADDENDUM REPORT DATE: October 4, 2021 PROJECT: STRUCTURAL OBSERVATION REPORT STRUCTURAL CONDITION OF HOA. 1.0 SCOPE OF WORK 1.1 KH provides this Addendum Letter with attachments of prior reports [2017] that document the condition of DBV with structural distress signs evident. 1.2 The purpose of this report is to identify critical structural conditions that may affect the occupancy/life-safety capacity of each building and provide a Risk Rating1 of Green, Yellow, or Red for each building/unit. 1.3 This Addendum Report cites previous reports as further evidence of the conditions proclaimed in Executive Summary Report [9/22/21]. 1 Risk Rating: GREEN = Safe occupancy; YELLOW = Medium Risk; RED = High Risk 10/4/2021 P. 001 OF 42 KHATRI INTERNATIONAL, INC. Page 2 of 2 STRUCTURAL & CIVIL ENGINEERS DIAMOND BAR VILLAGE HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 September 22, 2021 6440 Sky Pointe Dr., #140-299, Las Vegas, NV 89131 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830; FAX (702) 441-7356 ____________________________________________________________________________________________ 2.0 FIELD OBSERVATIONS The previous field observations from the Executive Summary remain unchanged and further proved with these prior reports. 3.0 RISK RATING and REPAIR RECOMMENDATIONS Khatri does not change any previous recommendations or advisories to DBV, as noted in the Executive Summary Report. 3.0 DISCLAIMER The basis for this report is a visual examination of the structure. Field conditions and unknown elements of a building make it hard and difficult to assess the structural capacity of a building and its structural elements to assess the resistance to future events such as earthquakes, landslides, subsidence, tsunamis, soil saturation, and other unknown events. The standard of care employed in this site visit and report is based on the industry standard. No warranties are provided either expressed or implied. Thank you for selecting my firm. Respectfully Yours, Dilip Khatri, PhD, SE Principal KHATRI INTERNATIONAL INC. 10/4/2021 P. 002 OF 42 KHATRI INTERNATIONAL, INC. Page 1 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Structural Observation Report Memorandum 2017-3 CLIENT: YVETTE MARIE ALLEN, CMCAR CERTIFIED COMMUNITY MANAGER DIAMOND BAR VILLAGE ASSOCIATION Property Address: DIAMOND BAR VILLAGE HOA 1850 S DIAMOND BAR BLVD, DIAMOND BAR, CA 91765 Date of Structural Observation: April 26, 2017 1.0 SCOPE OF WORK: This Report is a follow up on the Field Investigation performed on March 22, 2017, to determine the extent of Termite, Dry Rot, and structural damage to the different buildings at this project. At the March site inspection, certain areas were exposed for further investigation and this Report provides conclusions based on that follow up Report. 10/4/2021 P. 003 OF 42 KHATRI INTERNATIONAL, INC. Page 2 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ 2.0 FIELD OBSERVATIONS All 12 Buildings are typical in structural design and construction. They are designed as Type V Wood Frame Two Story with roof rafters and flexible diaphragms in the 1970s-80s construction. Over several decades there has been an accumulation of water damage, termite infestation, dry rot, and long term wear and tear on the Roofs with infestation damage leading into the structural walls. Photographs in this Report (Memorandum 2017-3; 6/15/17) and the previous Report (Memorandum 2017-2; 3/26/17) provide field notes that apply to all of the buildings. In summary these notes are: 2.1 The Roof Rafters are severely to critically damaged due to long term water/termite/dry rot damage. They will have to replaced along with the plywood sheathing. 2.2 Moisture damage does extend from the Roof Rafter line into the 2nd Story Walls down to/near approximately the 2nd Story Floor Line. This is noted on several photographs wherein these walls were exposed to show the existing conditions of the studs. The damage is extensive and some of these Walls will have to be reconstructed with new lumber. 2.3 The Balcony Beams are in good condition and do not require replacement. The edge Facia Beams are extensively damaged and should be replaced. Although the edge Facia Beams are not 10/4/2021 P. 004 OF 42 KHATRI INTERNATIONAL, INC. Page 3 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ structural and not load bearing, it is advised that these edge members should be replaced to avoid further spreading of termite/dry rot damage to the remaining healthy structural members in the Balcony and Second Floor Joists. 2.4 The Balcony Decks should be replaced with new decking material and waterproofing. 2.5 The Parapet of one of the Buildings will require to be replaced with a new connection to the existing Building. 2.6 Certain Buildings have potential Foundation cracking/damage that will require further investigation with exploratory Destructive Testing to expose their footings. This will be concluded on further site investigations. 10/4/2021 P. 005 OF 42 KHATRI INTERNATIONAL, INC. Page 4 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ 3.0 CONCLUSIONS & RECOMMENDATIONS 3.1 All Balcony Decks should be removed of permanent loading such as equipment, furniture, potted plants, AC Units, and any Dead Loads that create overloading to the Balcony Beams. Balcony Decks are not designed as permanent storage areas and should be vacated from all these extraneous loads that result in structural problems. 3.2 The Roof Rafters, Roof Sheathing, and all of the existing Spanish Tile will have to be removed and replaced with new materials. This will have to be done on all 12 Buildings at the Project. This will require a structural Roof Plan with site observation from the Structural Engineer and Deputy Inspection to assure the Roof Structures are restored to their proper structural integrity. 3.3 Second Story Walls that are termite damaged will require full reconstruction from the second story plate line. This will have to be done on all 12 Buildings at the Project. This will require a structural Wall Reconstruction Plan with site observation from the Structural Engineer and Deputy Inspection to assure the structure is restored to their proper structural integrity. 3.4 Further investigation on the Foundation cracking is necessary on certain buildings and shall be followed up with a separate Report. 10/4/2021 P. 006 OF 42 KHATRI INTERNATIONAL, INC. Page 5 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ 3.5 The Parapet will require a Structural Repair/Replacement Plan to reattach a new Parapet to the existing Building. 3.6 All Parking Shed structures shall be removed with a Demolition Permit, as they are not in code compliance and pose a safety hazard. 3.7 The next step is to prepare a Reconstruction Plan and obtain Permits through the local building department to address these areas. All work shall be done with approved Plans and Permits and a licensed Contractor. 3.8 The Buildings have extensive damage but do not pose an immediate life safety threat, at the time of this inspection. The owners are urged to address these damaged areas promptly to avoid further risk to the occupants. 10/4/2021 P. 007 OF 42 KHATRI INTERNATIONAL, INC. Page 6 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ 4.0 Limitations and Disclaimer The scope of this investigation consists of a physical examination of the subject building for the structural condition, as -built condition, working service life, and recent distress. This report does not warrant, guarantee, or certify the future performance of the building for future conditions against earthquakes, landslide, soil subsidence, water leakage, and any other unforeseen circumstances. Hidden conditions, lack of knowledge of existing material strengths, maintenance issues, weather conditions, and other unknown factors can affect the performance of buildings and are difficult to predict. This report is based on the professional standards of the industry utilizing the available tools, visual observation, and data noted in this report. No warranties are provided either expressed or implied. Thank you for working with Khatri International. Respectfully Yours, Dilip Khatri, PhD, SE Principal Khatri International Inc. 10/4/2021 P. 008 OF 42 KHATRI INTERNATIONAL, INC. Page 7 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 1: Wall Damage is exposed to show Termite and Dry Rot Infestation. This shows the extent of the damage is inside the Wall and the Balcony Supporting Beam. 10/4/2021 P. 009 OF 42 KHATRI INTERNATIONAL, INC. Page 8 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 2: Wall Damage is exposed to show Termite and Dry Rot Infestation. This shows the extent of the damage is inside the Wall and the Roof Rafters. 10/4/2021 P. 010 OF 42 KHATRI INTERNATIONAL, INC. Page 9 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 3: Wall Damage is exposed to show Termite and Dry Rot Infestation. This shows the extent of the damage is inside the Wall and the Roof Rafters. 10/4/2021 P. 011 OF 42 KHATRI INTERNATIONAL, INC. Page 10 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 4: Wall Damage is exposed to show Termite and Dry Rot Infestation. This shows the extent of the damage is inside the Wall and the Roof Rafters. 10/4/2021 P. 012 OF 42 KHATRI INTERNATIONAL, INC. Page 11 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 5: Wall Damage is exposed to show Termite and Dry Rot Infestation. This shows the extent of the damage is inside the Wall and the Roof Rafters. 10/4/2021 P. 013 OF 42 KHATRI INTERNATIONAL, INC. Page 12 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 6: Wall Damage is exposed to show Termite and Dry Rot Infestation. This shows the extent of the damage is inside the Wall and the Roof Rafters. 10/4/2021 P. 014 OF 42 KHATRI INTERNATIONAL, INC. Page 13 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 7: Wall Damage is exposed to show Termite and Dry Rot Infestation. 10/4/2021 P. 015 OF 42 KHATRI INTERNATIONAL, INC. Page 14 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 8: Wall Damage is exposed to show Termite and Dry Rot Infestation. This shows the extent of the damage is inside the Wall and the Roof Rafters. 10/4/2021 P. 016 OF 42 KHATRI INTERNATIONAL, INC. Page 15 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 9: Wall Damage is exposed to show Termite and Dry Rot Infestation. This shows the extent of the damage to the Roof Rafters. 10/4/2021 P. 017 OF 42 KHATRI INTERNATIONAL, INC. Page 16 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 10: Balcony supporting Beams are in Good Condition and can remain. The edge FACIA Beam should be replaced, but the Balcony Beams are okay. 10/4/2021 P. 018 OF 42 KHATRI INTERNATIONAL, INC. Page 17 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 11: Balcony supporting Beams are in Good Condition and can remain. The edge FACIA Beam should be replaced, but the Balcony Beams are okay. 10/4/2021 P. 019 OF 42 KHATRI INTERNATIONAL, INC. Page 18 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 12: Balcony supporting Beams are in Good Condition and can remain. The edge FACIA Beam should be replaced, but the Balcony Beams are okay. 10/4/2021 P. 020 OF 42 KHATRI INTERNATIONAL, INC. Page 19 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 13: Balcony supporting Beams are in Good Condition and can remain. The edge FACIA Beam should be replaced, but the Balcony Beams are okay. 10/4/2021 P. 021 OF 42 KHATRI INTERNATIONAL, INC. Page 20 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 14: Roof Rafters and plywood sheathing will have to be replaced. Some areas of the 2nd Story Walls will have to be reconstructed due to the extent of the Termite/Dry Rot infestation. 10/4/2021 P. 022 OF 42 KHATRI INTERNATIONAL, INC. Page 21 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 15: Leaning area along the Parapet requires the Parapet will need replacement with a new connected structure. 10/4/2021 P. 023 OF 42 KHATRI INTERNATIONAL, INC. Page 22 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 16: Leaning area along the Parapet requires the Parapet will need replacement with a new connected structure. 10/4/2021 P. 024 OF 42 KHATRI INTERNATIONAL, INC. Page 23 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 17: Leaning area along the Parapet requires the Parapet will need replacement with a new connected structure. 10/4/2021 P. 025 OF 42 KHATRI INTERNATIONAL, INC. Page 24 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 18: Extensive Roof Rafter damage from dry-rot and termite damage. 10/4/2021 P. 026 OF 42 KHATRI INTERNATIONAL, INC. Page 25 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 19: Balcony Beams are in good condition. 10/4/2021 P. 027 OF 42 KHATRI INTERNATIONAL, INC. Page 26 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 20: Extensive Roof Rafter damage from dry rot and termite damage 10/4/2021 P. 028 OF 42 KHATRI INTERNATIONAL, INC. Page 27 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 21: Interior of 2nd Floor shows FJ are in Good condition, no structural repair/replacement necessary. 10/4/2021 P. 029 OF 42 KHATRI INTERNATIONAL, INC. Page 28 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 22: Interior of 2nd Floor shows FJ are in Good condition, no structural repair/replacement necessary. 10/4/2021 P. 030 OF 42 KHATRI INTERNATIONAL, INC. Page 29 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 23: Interior of 2nd Floor shows FJ are in Good condition, no structural repair/replacement necessary. 10/4/2021 P. 031 OF 42 KHATRI INTERNATIONAL, INC. Page 30 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 24: Extensive Roof Rafter damage from dry rot and termite damage 10/4/2021 P. 032 OF 42 KHATRI INTERNATIONAL, INC. Page 31 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 25: Extensive Roof Rafter damage from dry rot and termite damage 10/4/2021 P. 033 OF 42 KHATRI INTERNATIONAL, INC. Page 32 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 26: Extensive Roof Rafter damage from dry rot and termite damage 10/4/2021 P. 034 OF 42 KHATRI INTERNATIONAL, INC. Page 33 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 27: Extensive Wall damage from dry rot and termite damage 10/4/2021 P. 035 OF 42 KHATRI INTERNATIONAL, INC. Page 34 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 28: Extensive Wall damage from dry rot and termite damage 10/4/2021 P. 036 OF 42 KHATRI INTERNATIONAL, INC. Page 35 of 35 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 June 15, 2017 3579 E. Foothill Blvd., #736 Pasadena, CA 91107 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 29: Extensive Wall damage from dry rot and termite damage 10/4/2021 P. 037 OF 42 KHATRI INTERNATIONAL, INC. Page 1 of 5 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 September 24, 2017 6440 Sky Pointe Dr., #140-299 Las Vegas, NV 89131 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Structural Observation Report Memorandum 2017-3 CLIENT: YVETTE MARIE ALLEN, CMCAR CERTIFIED COMMUNITY MANAGER DIAMOND BAR VILLAGE ASSOCIATION Property Address: DIAMOND BAR VILLAGE HOA 1850 S DIAMOND BAR BLVD, UNIT I-11 DIAMOND BAR, CA 91765 Date of Structural Observation: September 26, 2017 1.0 SCOPE OF WORK: Client requested review of Ceiling Joists (CJs) to determine if the wood cracking is of structural significance and method to repair. This Report is based on review of the photographs provided by the client and provides a technical recommendation for that specific unit only. 10/4/2021 P. 038 OF 42 KHATRI INTERNATIONAL, INC. Page 2 of 5 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 September 24, 2017 6440 Sky Pointe Dr., #140-299 Las Vegas, NV 89131 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ 2.0 FIELD OBSERVATIONS Figure 1: Cracking in the CJ 2.1 The field photos show a mild crack in one of the CJs that does not appear to be structurally significant but should be Sistered with (N) 2x8 CJ that can be attached with 6d nails @ 24” o.c. The end bearing should be established on the wall plate line to provide full support, or (N) Joist Hangers, depending on how the CJs are supported. 10/4/2021 P. 039 OF 42 KHATRI INTERNATIONAL, INC. Page 3 of 5 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 September 24, 2017 6440 Sky Pointe Dr., #140-299 Las Vegas, NV 89131 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ Figure 2: CJs are mostly in good condition, and should be connected with Blocking. 10/4/2021 P. 040 OF 42 KHATRI INTERNATIONAL, INC. Page 4 of 5 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 September 24, 2017 6440 Sky Pointe Dr., #140-299 Las Vegas, NV 89131 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ 2.2 The CJs are not level (as the Photographs show), and should joined with 2x8 Blocking at 6 ft o.c. along the span. This will tie the CJs together to allow them to perform as a diaphragm with composite action between the joists, rather than performing independently as they are now. 10/4/2021 P. 041 OF 42 KHATRI INTERNATIONAL, INC. Page 5 of 5 STRUCTURAL & CIVIL ENGINEERS Diamond Bar Village HOA R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 September 24, 2017 6440 Sky Pointe Dr., #140-299 Las Vegas, NV 89131 www.khatrinternational.com , dkhatri@aol.com Tel. (626) 351-4830 ____________________________________________________________________________________________ 3.0 CONCLUSIONS & RECOMMENDATIONS 3.1 Block the (E) CJs with 2x8 @ 6 ft o.c. 3.2 Sister the single cracked CJ with 2x8 and provide adequate bearing on the Top Plate of the supporting bearing wall. 4.0 Limitations and Disclaimer The scope of this investigation consists of a physical examination of the subject building for the structural condition, as -built condition, working service life, and recent distress. This report does not warrant, guarantee, or certify the future performance of the building for future conditions against earthquakes, landslide, soil subsidence, water leakage, and any other unforeseen circumstances. Hidden conditions, lack of knowledge of existing material strengths, maintenance issues, weather conditions, and other unknown factors can affect the performance of buildings and are difficult to predict. This report is based on the professional standards of the industry utilizing the available tools, visual observation, and data noted in this report. No warranties are provided either expressed or implied. Thank you for working with Khatri International. Respectfully Yours, Dilip Khatri, PhD, SE Principal Khatri International Inc. 10/4/2021 P. 042 OF 42