Attachment 17 Hanger 40 Solicitation Q and A.pdf

No. Question Answer

QA 001 Attachment 13 has one picture of the existing radius roof walkway. Are there additional pictures available?

There a site visit conducted on 1 May 2020. We can provide photos specific to the radius walk-way for those unable to attend the site visit.

QA 002 Is the existing radius roof walkway railing to be replaced, re-used or deleted? Demolished not reinstalled

QA 003

Does the contracting officer consider the metal roof system installation classification under the Davis Bacon Act to be SHEE 0067-00406/01/2019 Sheet Metal Worker, excludes HVAC Duct Installation or SUTX2014-006 07/21/2014 Roofer as listed in the General Decision Number TX 20200 231 02/14/2020?

There are exhaust fans bot no HVAC . Appropriate construction wage for the trade skill necessary to perform the work on government installations as required by the Department of Labor.

QA 004

Section 01 11 00.10 Paragraph 1.2.3.1.1 Structural Repairs a, b & c states to make necessary repairs to the structural decking and ensure current fastening patterns of metal deck comply with new wind uplift requirements. Should there be a contingency or unit cost included for these unforeseen conditions? If yes, please provide specific requirements and quantities for each condition.

Assume 20% contingency replacing of damaged decking

QA 005

Section 01 11 00.10 Paragraph 1.2.3.1.2a. has a zip rib panel listed using a 16" wide, 2.5" tall panel. Is this the required panel and size or can a 2" tall panel be used like the panel installed on Hangar 41?

The Z rib is 18” wide and 2.5” tall and could handle the curve and length.

Contractor can use the 2” but it shall require z clips if it can’t make the length. Z cips are acceptable. No lapping the panels not acceptable to lap. Z-clip yes / lapping no.

QA 006

Section 01 11 00.10 Paragraph 1.2.3.1.2a. states that roof panels will be formed in continuous length from eave to eave with no end laps, however, the same paragraph says the panels will have a point of fixation at the ridges to allow thermal movement at the eave. If the panels are to be continuous length from eave to eave as specified, there will not be a ridge as specified. Are we to install a continuous panel from eave to eave or are we to provide for a ridge as specified?

Contractor shall be allowed to use a z clip.

QA 007

Section 01 11 00.10 Paragraph 1.2.3.1.2b, requires a modified bitumen system be utilized. Can an 80 mil TPO roof system be used in lieu of the specified system.

Contractor shall be allowed to install TPO roofing instead of modified bitumen a new spec will be included in the package for the TPO roofing.

Hanger 40 Roof Replacement Solication Question and Answers

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QA 008

Section 01 11 00.10 Paragraph 1.2.3.1.2c, lists 2-layers of 1" rigid board insulation and a ½" cover board is to be used at the modified bitumen area, however, there is no mention of insulation requirements at the metal roofs. Is there a requirement for the metal roof areas as specified to be insulated?

30 two layers polyiso 20psi insulation cross lapped both directions .

QA 009

Section 01 11 00.10 Paragraph 1.2.3.1.2d, states to install tapered insulation to achieve a minimum slope of ¼" in 20' - 0", please verify this is the requirement or if the designer actually requires a minimum slope of ¼" in 1'-0" per industry standard? Required slope shall be ¼" in 1'-0

QA 010

Section 01 11 00.10 Paragraph 1.2.3.1.2f., states all downspout and gutter color will be beige (not red) in accordance with the base standards. Will the metal manufacturer's standard colors be acceptable, or will a special color be required to meet the base standards?

Manufacturer's standard colors be acceptable as long as the gutters and downspout are Biege. The roof shall be red

QA 011

Section 01 11 00.10 Paragraph 1.3 Contract Drawings, references as built drawings from similar project B41 will be furnished. Will this information be forthcoming, and will they supersede the previously provided specification / requirements? Yes

QA 012

Section 07 22 00 Paragraph 1.7 FM Approval Requirements. FM approvals are provided in increments of 15. The standard FM approval for this region is 1-90. The next approval would be 1-105 and so on. What is the FM approval requirement?

I90 115mph wind

QA 013 Section 07 22 00 Paragraph 1.9 Certifications. Are indoor air quality certifications required for roofing products? No it’s a hangar.

QA 014

Section 07 22 00 Paragraph 3.2 Installation of Vapor Retarder. Is a vapor retarder required on the project including under the metal roof panels? Yes

QA 015

Section 07 52 00 Description of Roof Membrane Systems states to use a minimum three-ply APP modified bitumen membrane. An APP membrane is torch applied. Other indications within the specification require asphalt installation. Is the 3-ply modified bitumen roof membrane torch applied or hot asphalt applied?

(Torch or hot mopped) we are changing to TPO

QA 016

Section 07 52 00 Paragraph 2.1.1. Energy Performance states to provide top surface finish that meets the criteria for Cool Roof Products and provides Heat Island reduction. These requirements can be met using a white sheet only. ls the modified bitumen roof system as specified to be white? We are changing to TPO

QA 017

Section 07 52 00 Paragraph 2.6 Membrane Surfacing lists three different surfacings. Are we to choose one of these options or should we install white modified cap sheet to meet the requirements of Paragraph 2.1.1? We are changing to TPO

QA 018

Section 07 52 00 Paragraph 2.11 Walk Pads. Are we to provide the materials listed in this paragraph or are we to provide paver blocks as listed in Paragraph 2.12 as walkways? We are changing to TPO

QA 019

Section 07 52 00 Membrane Liner. The specified modified bitumen roof system does not test the rated system with a membrane liner as specified. Should we install the liner as specified anyway? We are changing to TPO

QA 020

Section 07 52 00 Top Coating states to provide a top coating that is Energy Star labeled. If we use the manufacturer's Energy Star rated cap sheet as pa1t of the modified bitumen roof system, an Energy Star rated coating will not be required. Should we figure the Energy Star coating anyway? We are changing to TPO

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QA 021

Section 07 52 00 Paragraph 3.7 Infrared Inspection states to provide infrared inspection eight months after completion of roofing system. With all of the specified warranty requirements, is the infrared testing a necessary requirement? Yes, Thi is a mandated post completion inspection that has to happen

QA 022 Section 07 61 14.00 20 1.3.1 Design Requirements, a.c., allows for snap seam panels. Are snap seam panels allowed for this project? No Snap seams

QA 023 Section 07 61 14.00 Paragraph 1.6.4 states the applicator must have applied five installations of similar size and scope as this project within the previous 3 years. Do the five required installation have to be installations performed on military installations? No

QA 024

Section 07 61 14.00 20 Paragraph 2.1. states to obtain KO approval if panels exceed 30 feet. Sheets must provide no less than 12 inches of coverage and minimum corrugation height (seam height) of 1.75 inches. Section 01 11 00.10 Paragraph 1.2.3.1.2a requires the panel to be 16 inches wide with a 2.5" seam using continuous panels from eave to eave.

Please clarify the requirement for panel width, seam width and panel length

As stated before 2 inch 16” wide will be accepted but will require z-clip because it can make the entire length.

QA 025

Section 07 61 14.00 20 Paragraph 2.5 Thermal Insulation states to install insulation. What will the requirement be for the insulation R-Value?

R30 QA 026 Section 07 61 14.00 20 Liner Panels. Will liner panels be required for the metal roof system specified for this project? No

QA 027

Section 09 90 00 Paints and Coatings. What is the Scope of Work requirement for this section?

This is for the facial wood.

QA 028

SOW Section 01 11 00.10 paragraph 1.2.2.1 states, “Remove any unused or abandoned plumbing, electrical, mechanical, or communications penetrations thru the roof deck and parapet walls. All holes in the parapet walls & roof deck left by these penetrations should be sealed.” As we did not perform a site visit it is not possible to quantity the quantity of unused or abandoned penetrations requiring this work. In order to accurately account for this cost in our proposal, Will the government please provide a quantity and size that the contractor should assume in our bid and where possible provide pictures?

Assume 20%.

QA 029

SOW Section 01 11 00.10 paragraph 1.2.3.1.1.a Large Upper Curved Roof, Intermediate and Lower Sloped Roofs, and Hangar Door Mansards:, states, “Make any necessary repairs to the structural decking according to SDI and ASTM recommendations with fastener spacing dictated by local wind codes.” It is not possible to quantify potential repairs needed structural decking in these areas until roof demolition has been completed and evaluation by a roofing contractor and/or structural engineer has been performed. In order to account for the potential of structural decking repairs the client has typically provided an allowance that the contractor should assume in their bid. Will the government please provide an allowance that should be included in our bid or remove the requirement to include structural decking repairs from the scope

Assume 20%.

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QA 030

SOW Section 01 11 00.10 paragraph 1.2.3.1.1.b Lower Flat Roof Areas and Upper Roof Corner Hangar Pockets:, states, “Make any necessary repairs to the structural decking according to SDI and ASTM recommendations with fastener spacing dictated by local wind codes.” It is not possible to quantify potential repairs needed for structural decking in these areas until roof demolition has been completed and evaluation by a roofing contractor and/or structural engineer has been performed. In order to account for the potential of structural decking repairs the client has typically provided an allowance that the contractor should assume in their bid. Will the government please provide an allowance that should be included in our bid or remove the requirement to include structural decking repairs from the scope?

Assume 20%.

QA 031

SOW Section 01 11 00.10 paragraph 1.2.3.1.1.c Sloped Shop Roof: states, “Make any necessary repairs to the structural decking according to SDI and ASTM recommendations with fastener spacing dictated by local wind codes.” It is not possible to quantify potential repairs needed for structural decking in these areas until roof demolition has been completed and evaluation by a roofing contractor and/or structural engineer has been performed. In order to account for the potential of structural decking repairs the client has typically provided an allowance that the contractor should assume in their bid. Will the government please provide an allowance that should be included in our bid or remove the requirement to include structural decking repairs from the scope?

Assume 20%.

QA 032

SOW Section 01 11 00.10 paragraph 1.2.3.2 states, “Replace all roof drain collars with new galvanized cast iron units with galvanized drain screens.” Please quantify the number of locations.

Disregard “Replace all roof drain collars with new galvanized cast iron units with galvanized drain screens.”

Apparently are none.

QA 033

SOW Section 01 11 00.10 paragraph 1.2.3.3.a states, “Coordinate with on-site project engineer any work required to move or relocate any type of communication or monitoring equipment of any kind to facilitate installation of the roofing system.” Are we expected to include the cost of this relocation in our bid or will this relocation be completed by the government?

Yes, there are roof antenna but the comm people on base will move them if required.

QA 034

SOW Section 01 11 00.10 paragraph 1.2.3.3.a states, “Coordinate with on-site project engineer any work required to move or relocate any type of communication or monitoring equipment of any kind to facilitate installation of the roofing system.” this relocation is not being completed by the government and we are to assume the cost of relocation in our bid please provide photographs of equipment to be relocated.

The base comm people will be doing the moving of comm equipment

QA 035

Attachment 12 Cost Estimate Breakdown includes a significant number of items that do not appear to apply to the job, are repetitive, etc. We assume this is an example of what should be provided as our line item estimate. Please confirm this is an example of the template that should be provided but not the exact line items that must be included.

Your estimate should be based on your expertise not the government estimator’s.

QA 036

Attachment 12 Cost Estimate Breakdown includes what appears to be 90,000 SF of 22-gauge metal roof decking. Are we include this quantity and material in our bid or is this document just an example line item estimate and not actual requirements of the project?

Your estimate should be based on your expertise not the government estimator’s.

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QA 037

Attachment 16 Submittal List SD-05 Design Data includes Section 01 33 16.00 10 and references Subpart 1.5 which is not included in the Attachment 1 SOW and Specs. This specification section is a “Design After Award” specification which would be typical of a Design Build project and includes deliverables such as Design Quality Control Plan, Post Award Conference, and Initial Design Conference. Was this specification listed in error in Attachment 16? This was an error disregard

QA 038

Section 01 30 00 paragraph 1.5.2 states that the Superintendent can also serve as the Quality Control Manager. Section 01 35 26 paragraph 1.5.1.1.1 states that the Site Safety and Health Officer can also serve as the Quality Control Manager and Superintendent. Section 01 45 00.10 20 paragraph 1.5.1.1 states that the QC manager may perform the duties of project superintendent. As the scope of this project will be primarily performed by a single contractor is it acceptable for one individual to fulfill all three roles or will two individuals be required onsite at all times? Yes, one person can fulfill all three roles

QA 039

Section 01 14 00 1.3.5 states that the building will be occupied during construction. As such we assume a fence will not be required around the facility. Please confirm.

Some fencing will be required. Hangar 41 had the front of the building fenced in and built plywood covered walkway for the building occupant to enter the building

QA 040

UFC 3-110-03 para 1-8.6 states “any part or component of the building, facility, structure, or equipment requiring future maintenance work at roofs must incorporate fall prevention techniques to eliminate fall hazards during occupancy and when performing maintenance work.” Paragraph 5-2.10.4 states “roofs with slope greater than 3:12 shall have permanently installed fall protection.” Is the Contractor responsible for designing and installing a permanent fall protection system on the roof for Government use after hangar is completed and turned over to the Government? No

QA 041 Please confirm location and dimensional extents of laydown area to be provided to the Contractor.

A laydown area will be provide to the west of the Hanger Approximately 100’x150’

QA 042

Section 01 11 00.10 paragraph 1.2.3.4.b states “Perform water spray tests.” If required, please provide required testing protocol or procedure.

Yes To test the performance of metal roofing products in this regard, ASTM E1646 titled “Standard Test Method for Water Penetration of Exterior Metal Roof Panel Systems by Uniform Static Air Pressure Difference”.

QA 043

The Attachment 14 “Site Drawings” indicates existing gypsum roof decking; however, the Attachment 01 SOW consistently refers to existing structural steel roof decking. Please confirm that all existing roof decking is steel, and no gypsum roof decking exists. It is steel decking

QA 044 Solicitation pages 23-26 of 51 contains some text conversion errors thus not legible. Please provide corrected version Corrected in amendment 1

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QA 045

The Summary of Work basis of design for the standing seam metal roof is Merchant & Evans, Inc. Zip-Rib. Will other manufacturers be acceptable if they meet, or exceed, the provided specification section 076114.0020?

Yes if they meet, or exceed and are submitted and approved.

QA 046

The Summary of Work states the insulation substrate for both roofs shall consist of two (2) layers of 1” Polyisocyanurate insulation (and ½” protection board in areas with Modified Bitumen). But specification section 072200 lists the R-value to be 16 or more which would require two (2) layers of 1.4” Polyisocyanurate insulation. The recently completed Hangar 41 project was done with the total thickness of 2”. Is the total thickness of 2” Polyisocyanurate insulation acceptable? 2” Polyisocyanurate insulation is acceptable

QA 047

The Summary of Work states to remove the ladder with the handrail located on the south west section of the building that runs form the eave to the top of the barrel. This ladder was not reinstalled on the Hangar 41 project. Can you confirm that this ladder with handrail is to NOT be reinstalled?

Correct handrail is to NOT be reinstalled

QA 048

The Summary of Work specifies an installation for the metal roofing panels to be continuous length from eave to eave with not end laps. Are other installation methods acceptable, as long as they meet the manufacturer warranty requirements, don’t have panel laps, and do not have exposed fasteners? Laps are not acceptable / Z-clips are

QA 049

Can you provide the thickness of the existing roof and insulation? Hangar 41 had two (2) layers of insulation and horizontal wood insulation stops.

W e a r e assuming that Hangar 40 is the same as Hangar 41

QA 050

Due to the size of the metal panels and size of the crane needed to lift the panels we will need a very large lay down area.

Will we be able to access the roof from both the East and West Hangar Door elevations?

The will be a large lay down area to the east of the Hangar and there will be total access to east and west sides of the hangar.

QA 051 Will a FOD prevention program be required since this project is on an active airfield?

Yes, the FOD prevention program is required keep foreign objects off the apron.

QA 052

The Summary of Work requires gutter nets and downspout strainers due to trees overhanging the roof. There does not appear to be any trees close to the project. Will this be a requirement if there are not trees overhanging the roof? Yes net will required

QA 053

Will a crane permit be required when lifting the panels? Who is responsible for approving the permit for work at Randolph AFB? What are the minimum requirements for a permit at Randolph AFB?

We set that in motion already the PM has taken that responsibility.

QA 054

The Closeout Submittals section requests a 5-year installer warranty for both roof systems. However, the roofing sections request a 2-year installer warranty. Please confirm that the required installer warranty will only be a 2-year warranty. Yes 2-year installer warranty acceptable.

QA 055

Roofing section 075200 requires an infrared inspection eight months after completion of the roof. Is this a required item it is an additional cost? Yes it is required

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QA 056

Roofing section 075200 specifies a 3-ply modified bitumen roof to be installed in hot asphalt or torch applied. Since the hangar door pocket roofs are very small and difficult to access, will you accept an alternate of 80mil fully adhered TPO roof as installed at Hangar 41? It would be extremely dangerous to try and install a modified bitumen roof at these locations.

Contractor may substitute TPO roof for bitumen roof. TPO spec shall be added to the package

QA 057

During the site visit it was mentioned that rotten wood at the eave/fascia would require replacement. Until we get into the work it is difficult to quantify the amount of wood that will require replacement. Will the government provide a percentage of wood to include as an allowance that requires replacement? 25%

QA 058

If rotten wood is required to be replaced does it require panting?

All new facial wood require painting Biege. Existing facial the is not rotten should already be painted.

QA 059 What is the required roof insulation R value? R30

QA 060

During the site visit it was indicated that it would be recommended that 20% deck repair be included in contractor bids.

order to prevent this item that potentially will not be required from impacting the final awarded price is it possible to include the price per SF of deck as a part of the proposal submission that is not evaluated as part of the bid price? That is a good Idea Government will up date the SOW to reflect this statement QA 061 What is the extent of the painting scope? Only paint replaced fascia wood.

QA 062

Section 1.2.3.1.1 Structural Repair of the SOW makes several references to structural repairs yet provides no expected quantities. What quantity of decking repair should we include in our proposal?

20% of decking assuming there should not be any structural repairs.

QA 063

Section 1.5.1.1.1 of the SOW allows the Superintendent to serve as the SSHO and the SSHO to serve as the Quality Manager. Can one person fill all 3 roles (Superintendent/SSHO/CQM) assuming they are qualified? yes

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