DTMB Oper Center MDOT Warehse Exter Envelope Study.pdf

Phase 100 Study for

DTMB Operations Center and MDOT Warehouse Lansing, Michigan

Exterior Envelope Renovations

Submitted By:

Office of Facilities Administration

PROJECT:

File: 171/21245.TYC Contract Order: Y21437

April 3, 2023

DTBM Operations Center and MDOT Warehouse Phase 100 Exterior Envelope Study

File: 171/21245.TYC April 3, 2023

H+B: 21319

TABLE OF CONTENTS

Background and Observation

DTMB Operations Center 1

MDOT Warehouse 5

Conclusion 8

Recommendation 8

Appendices

Appendix A: DTMB Operations Center Exterior Elevations

Appendix B: DTMB Operations Center Exterior Envelope Work Budget Estimate

Appendix C: DTMB Operations Center Reroof Budget Estimate

Appendix C: MDOT Warehouse Exterior Envelope Work Budget Estimate

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Background

DTMB Operations Center: Located at 7285 Parsons Drive, Dimondale MI was constructed in 2002 I, it is a steel framed, 2 story building with an exterior envelope consisting of brick, limestone, and curtain wall windows. The roof is structurally sloped with a black rubber membrane that is original. While the overall building has been maintained well by DTMB operations staff, there are several maintenance items that have increased in severity over the years due to the original design of the building envelope and construction implementation of those details.

Cap is short of face of wall; drip groove is buried in bed joint allowing water to get under caps.

Joint sealant has gone bad allowing water to infiltrate.

Pier cap has shifted out due to water infiltration freezing- in winter – note gap in bed joint material for vertical limestone panel. Relying on sealant to try and keep water out of the vertical joint.

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Failed joints have allowed water to infiltrate and freeze breaking off parts of the limestone caps. Note that most all limestone caps are not wide enough so that the drip groove is out past the edge of the stainless-steel metal coping.

Existing condition directs water back under the cap instead of making it drip off past the face of the stainless-steel coping. Most

Coping connections have also failed.

- 3 -

Limestone cap is sliding back due to water infiltration freezing in the winter, this condition only accelerates over time. Many problems here with detailing and quality of workmanship.

- 4 -

Failed and missing joint sealants at limestone panels and curtainwall system. Stainless-steel limestone flashing cut short during construction.

- 5 -

MDOT Warehouse Building: Located at 7575 Crowner Drive, Dimondale, MI. Date of original construction is unknown. It appears to have been built in the 1980’s and has undergone multiple renovations over the years. The building is a single story and high-bay warehouse space. The exterior envelope is a single-wythe fluted masonry block and punched window openings. The roof is sloped with a built-up modified bituminous roof which is not the original roof. While the overall building has been maintained will by DTMB operations staff, there are several items that have historically proved problematic: water vapor migrating through the concrete slab on grade floor, water infiltration through the exterior walls – especially at the lintels, and ponding water against the north half of the west wall.

Existing grade slopes back to the building at this location. New stone maintenance strip with drain tile proposed here. Note: standing water stain on the block under the window to the left.

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Lintel over overhead doors is rusting and displacing the fluted block. Note attempts to caulk masonry bed joint.

Overhead door lintels and jambs need to be removed and replaced with galvanized lintels and jambs and then have the masonry reinstalled.

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Displaced masonry block at overhead doors caused by rusting lintels has allowed water to infiltrate the walls and get trapped behind the wall paint, causing it to create “bubbles” of efflorescence behind the paint. Walls need to be shot blasted and repainted after lintel work and building is sealed with a penetrating block sealer.

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Interior drywall repair to happen after exterior envelop work is complete.

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Conclusion

Operations Center: The implementation of the scope of work outlined in this report will address the exterior envelope needs for the next 20 years with normal inspection and minimal maintenance. The roof will have a new 20-year warranty, parapet walls and piers will either have limestone caps removed and reset correctly or replaced with a metal coping system, all exterior masonry and curtain wall joints will be recalked and the vertical roof access ladder in the 2nd floor mechanical room will be replaced with a stair which will improve maintenance staffs access to the roof in much safer manner.

MDOT Warehouse: The implementation of the scope of work outlined in this report will address the exterior envelope needs for the next 20 years with normal inspection and minimal maintenance. The tuck-pointing and sealing of the single-wythe exterior masonry block walls will help eliminate water infiltration, adding stone maintenance strips that are properly drained will help reduce the water vapor issues coming up through the concrete floor and replacement of the east overhead door lintel by the front offices is needed now as the masonry is being displaced by the rusting overhead door lintels.

Recommendations

DTMB should prioritize and allocate the funding to perform the exterior envelope, reroof, and roof access work. By not performing corrective work soon, DTMB will see increased yearly maintenance costs caused by further deterioration of the envelope of the building. Deferring the work will also only increase the scope of the work needed due to further deterioration and inflation of labor and material costs.

Appendices

Appendix A: Operations Center Existing Exterior Elevations

Appendix B: Operations Center Exterior Envelope Work Budget Estimate

Appendix C: Operations Center Reroof Budget Estimate

Appendix D: MDOT Warehouse Exterior Envelope Work Budget Estimate

DTMB OPERATIONS CENTER EXTERIOR ELEVATIONS

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APPENDIX A

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ALL VERTICAL CURTAIN WALL JAMBS AND MASONRY CONTROL JOINTS TO BE RECAULKED

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LEAK AT MAIN ENTRY ROOF TO BE FOUND AND FIXED WATER-TIGHT

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DTMB OPERATIONS CENTER EXTERIOR ENVELOPE

WORK BUDGET ESTIMATE

Opinion of Probable Construction Costs #1 Date 04/03/23

DTMB - Operations Center - Exterior Envelope Work

Note: 1. The quantities and costs are shown for Phase 100 estimating purposes only.

2. Budgeting provided by Hobbs+Black Architects & Borner Restoration HB# 21-319

Item No. Description Quantity Unit Unit Cost Amount Site Improvements

1 Site restoration 1 Allow $15,000.00 = $15,000

2 Site Work Subtotal $15,000

Building Improvements

3 Remove all existing pre-cast stone wall caps 1 Allow $235,000.00 = $235,000 4 Prep and install new treated wood blocking

5 Install new pre-finished aluminum coping

6 Recaulk Exterior Windows/Control Joints/etc 1 Allow $105,000.00 = $105,000 7 Fix leak and Main Entry 1 Allow $5,000.00 = $5,000 8 Existing roof protection (not req if reroofing) 1 Allow $10,000.00 = $10,000 9 Reset pier caps (12) locations 12 Allow $8,500.00 = $102,000 10 New fiberglass stair and access hatch to roof 1 Allow $45,000.00 = $45,000

11 Building Improvements Subtotal $502,000

12 Site and Building SubTotal $517,000

14 Contractor Overhead & Profit 1 Allow 4.0% = $20,680 15 General Conditions & Staffing Costs 1 Allow 12.0% = $62,040 16 Contractor Construction Reimursables 1 Allow 1.5% = $7,755 17 Performance, Labor & Materials Bond 1 Allow 2.5% = $12,925

18 Total Hard Bid Construction Cost $620,400

20 Plan Review Fee - if required 1 Allow $2,000.00 = $2,000

29 Soft Cost Total $2,000

30 Project Total Hard Bid & Soft Costs $622,400

32 A/E Fee Phases 500/600/700 1 Allow 10.0% = $62,240 33 A/E Reimbursables 1 Allow $1,200.00 = $1,200 34 Construction Contingency 1 Allow 15.0% = $93,360 35 DTMB Fee 1 Allow 10.0% = $62,240

36 Subtotal $841,440

49 ESTIMATED TOTAL PROJECT COSTS = $841,440

DTMB OPERATIONS CENTER REROOF

BUDGET ESTIMATE

Opinion of Probable Construction Costs #1 Date 09/16/22

DTMB - Operations Center - Roof Restoration

Note: 1. The quantities and costs are shown for Phase 100 estimating purposes only.

2. Budgeting provided by Hobbs+Black Architects & Borner Restoration HB# 21-319

Item No. Description Quantity Unit Unit Cost Amount Site Improvements

1 Site restoration 1 Allow $15,000.00 = $15,000

2 Site Work Subtotal $15,000

Building Improvements

3 Thermal scan roof and replace wet insulation 1 Allow $20,000.00 = $20,000 4 Remove exist. Rubber roof & install gyp cover board 200,000 SF $9.50 = $1,900,000

& new 60 mil rubber roof (new 20 year Firestone warranty)

11 Building Improvements Subtotal $1,920,000

12 Site and Building SubTotal $1,935,000

14 Contractor Overhead & Profit 1 Allow 4.0% = $77,400 15 General Conditions & Staffing Costs 1 Allow 12.0% = $232,200 16 Contractor Construction Reimursables 1 Allow 1.5% = $29,025 17 Performance, Labor & Materials Bond 1 Allow 2.5% = $48,375

18 Total Hard Bid Construction Cost $2,322,000

20 Plan Review Fee - if required 1 Allow $2,000.00 = $2,000

29 Soft Cost Total $2,000

30 Project Total Hard Bid & Soft Costs $2,324,000

32 A/E Fee Phases 500-700 1 Allow 5.0% = $116,100 33 A/E Reimbursables 1 Allow $1,200.00 = $1,200 34 Construction Contingency 1 Allow 15.0% = $348,600 35 DTMB Fee 1 Allow 10.0% = $232,400

36 Subtotal $3,022,300

49 ESTIMATED TOTAL PROJECT COSTS = $3,022,300

MDOT WAREHOUSE EXTERIOR ENVELOPE

WORK BUDGET ESTIMATE

Opinion of Probable Construction Costs #1 Date 09/15/22

MDOT - Warehouse Exterior Envelope & Site improvements

Note: 1. The quantities and costs are shown for Phase 100 estimating purposes only.

2. Budgeting provided by Hobbs+Black Architects & Borner Restoration HB# 21-319

Item No. Description Quantity Unit Unit Cost Amount Site Improvements

1 Sitework (stone maint. strip & found. damp-proofing) 1 Allow $40,000.00 = $40,000

2 Site Work Subtotal $40,000

Building Improvements

3 Clean & seal all fluted split-face block 1 Allow $50,000.00 = $50,000 4 Miscellaneous window lintel work 1 Allow $9,500.00 = $9,500 5 Selective masonry demolition @ OHD lintel 1 Allow $5,000.00 = $5,000 6 Remove & replace OHD lintel with galv. Lintel 1 Allow $15,000.00 = $15,000 7 Reinstall masonry block @ OHD lintel location 1 Allow $10,000.00 = $10,000 8 Miscellaneous tuck-pointing 1 Allow $12,500.00 = $12,500

Miscellaneous drywall repair at windows 1 Allow $8,500.00 = $8,500

11 Building Improvements Subtotal $110,500

12 Site and Building SubTotal $150,500

14 Contractor Overhead & Profit 1 Allow 4.0% = $6,020 15 General Conditions & Staffing Costs 1 Allow 12.0% = $18,060 16 Contractor Construction Reimursables 1 Allow 1.5% = $2,258 17 Performance, Labor & Materials Bond 1 Allow 2.5% = $3,763

18 Total Hard Bid Construction Cost $180,600

20 Plan Review Fee - if required 1 Allow $2,000.00 = $2,000

29 Soft Cost Total $2,000

30 Project Total Hard Bid & Soft Costs $182,600

32 A/E Fee Phases 500-700 1 Allow $40,000.00 = $40,000 33 A/E Reimbursables 1 Allow $1,200.00 = $1,200 34 Construction Contingency 1 Allow 15.0% = $27,390 35 DTMB Fee 1 Allow 10.0% = $18,260

36 Subtotal $269,450

49 ESTIMATED TOTAL PROJECT COSTS = $269,450