Loren Data's SAM Daily™

FBO DAILY - FEDBIZOPPS ISSUE OF DECEMBER 14, 2013 FBO #4403
DOCUMENT

Z -- LAX AIR TRAFFIC CONTROL TOWER (ATCT) ADMINISTRATION BUILDING ROOF REPAIR - Attachment

Notice Date

12/12/2013
 

Notice Type

Attachment
 

NAICS

238160 — Roofing Contractors
 

Contracting Office

FEDERAL AVIATION ADMINISTRATION, AAQ-530 WN - Western Service Area (Seattle, WA)
 

Solicitation Number

15457
 

Response Due

1/2/2014
 

Archive Date

1/2/2014
 

Point of Contact

Clarence Davis, clarence.davis@faa.gov, Phone: 425-227-2938
 

E-Mail Address

Click here to email Clarence Davis
(clarence.davis@faa.gov)
 

Small Business Set-Aside

N/A
 

Description

The Federal Aviation Administration (FAA), Northwest Mountain Region is conducting a Market Survey to improve the Government's understanding of the current marketplace and to identify qualified and capable sources. This is not a Screening Information Request (SIR) or Request for Offer (RFO) of any kind. Responses to this market survey will be used to determine if adequate competition exists to set the requirement a side for certified Small Economicaly Disadvantaged Businesses (SEDB)/ 8(a) program, Service-Disabled Veteran Owned Small Business (SDVOSB), or Small Businesses in lieu of opening the acquisition up for full and open competition. All interested vendors are advised that the FAA will not pay for any information or any administrative costs incurred that are associated with any response received from industry in response to this Market Survey. Therefore, any costs associated with vendor's market survey submissions will be solely at the interested vendor's expense. LAX ATCT ADMINISTRATION BUILDING ROOF REPAIR SCOPE OF WORK The contractor shall provide all labor, materials, equipment (except Government Furnished Equipment (GFE)), transportation, insurance, notifications, licenses, permits, fees, inspections, testing, scheduling, reporting, submittals and supervision necessary for the facility improvements for roof repair of the LAX ATCT Administrative Base Building at the LAX International Airport, Los Angeles, California. The work shall include but is not limited to the following: I.General Description: A)Install new membrane roofing system (KEE or PVC) with Simulated Metal Roofing Profile. See contractor �s qualifications below. B)Remove existing and new cladding on the Fascia and Soffit Areas for Roof #3 C)Other Items: 1-Test existing tie-off anchors on roof. 2-Provide a water diffuser on water drainage from pipes in integral gutters. 3-Remove Lightning Protection System as needed during re-roofing work and replace. II.Detailed Description of Work: A.Membrane Roofing System Contractor will perform an uplift resistance test on existing metal roof prior to installing the membrane roofing system. The FAA will identify which areas are required to be tested. If test results are found to be adequate contractor shall proceed with the new membrane system installation as follows: Install a membrane roofing system that uses a Simulated Metal Roof Profiles (SMRP) roofing membrane to give the appearance of a metal roof. The profiles shall be permanently adhered in a thermally activated adhesive and the membrane comes in standard colors of light or dark grey. The membrane roofing system would consist of the following components (listed in order from innermost to outermost component): Rigid insulation � 1 � � deep rigid insulation will be provided in the valleys of the existing roofing system between the standing seam ridges. The width of the rigid insulation will vary depending upon the width between the standing seams, but will be identified as typically 12 � on the design drawings based upon the standard 12 � � spacing between the existing roof �s standing seam ribs. The 1 � � depth is selected for the rigid insulation to provide assurance that the sheathing board laid atop it will clear all of the existing standing seam ribs. The rigid insulation will be glued to the valleys of the metal existing standing seam roof. Exterior sheathing board - one layer of � � thick exterior sheathing board (Densdeck or equivalent) will be attached atop the rigid insulation. The one layer of � � thick board is used instead of one � � layer since the � � thick board will be better able to conform to the curve of the roof, particularly the bid-directional curves associated with Roofs #1 and #3. The exterior sheathing board will be mechanically anchored to the existing structure metal deck. The anchorage of the exterior sheathing board will need to take into account all aspects of wind uplift loading on the roof (as defined in ASCE-7). This will result in an anchorage pattern that will have the highest concentration of anchors at the corners, a lesser amount at the edges and the least amount (largest spacing between anchors) at the interior portions of the roof. The � � board does not have very good spanning capabilities where there is a gap in the 1 � � rigid insulation at the existing standing seam, however per information provided by the manufacturer it can span unsupported up to 2 � �. The span at the gap for the vast majority of the roof construction should be less than 2 �, however if the span exceeds 2 � as noted in the drawings then the gap shall be filled with foam insulation. The surface of foam insulation shall be cut to align with top of rigid insulation, on both sides, before installation of exterior sheathing. Single-ply roofing membrane � 45 - 60 mil thick. The membrane complies with the very stringent ASTM D 6754 Standard. The 45 -60 mil single-ply roofing membrane (Ethylene Interpolymer KEE or PVC) as per specification 07 54 16 provides a 20 year labor and material warranty. The roofing will be fully adhered to the exterior sheathing board. Supplemental mechanical attachments may be required at the corner and edge conditions for the membrane depending upon the wind uplift loading (see discussion for wind loading under the previous bulleted item). Welded simulated metal roofing profile (SMRP) � a welded rib will be adhered to the roof with a height of approximately 1 � to match the appearance of the existing metal standing seam roofing system. The welded seams are strictly cosmetic. The seams will be installed in a straight line. Due to the bidirectional curve for Roofs #1 and #3 the SMRP will not necessarily be straight with the east and west boundaries of those roofs. This is much like the current condition with the standing seam metal roof. On Roof #2 since it is not bi-directional the SMRP ribs will be parallel with the east and west ends of the roof. At roofs with bi-direction slopes (Roofs #1 and #3) the seams will have gaps at the base, but not at the top of the rib, between the attachment points. This will prevent water from accumulating on the �uphill � side of the seam. The gaps will be provided only in the areas that are relatively flat in the opposite direction. For example at Roof #1 the gaps at the western end will be located within the middle 10-15 feet of the seam �s overall length and those at the eastern end (constant elevation at the bullnose edge) will extend for the full length of the seam. The spacing of the SMRP for Roof #1 will match the spacing of the existing fascia panels on the north and south sides of the roof. The spacing of the SMRP for Roof #3 will match the spacing of the new ribbed fascia panels that will be installed on the north and south facades (approximately 12 � on-center). The spacing of the SMRP for Roof #2 is not dependent upon any edge conditions. A spacing of 12 � on-center will be indicated for this roof, with the initial rib equally spaced from the integral gutters on the east and west ends of the roof. Edge Condition Treatment for the Membrane Roof There are multiple conditions for the end of the roofs. The following is a summary of the proposed treatment of the new roof at the various edge of roof conditions: Roof #1 The integral gutter that is parallel with the existing standing seam roof ribs on the inside face of a composite aluminum panel bullnose (east end) will have the new roof stop at the inside face of the integral gutter. The roof will be flashed into the integral gutter. The integral gutters that are perpendicular with the existing standing seam roof ribs that merge with ribbed fascia panels (north and south ends) will have the new roof stop at the inside face of the integral gutter. The roof will be flashed into the integral gutter. The ribs at the intersection of the fascia panel to the roof will be trimmed either at the miter at the roof seam intersection (if the roof seam is not attached at the outside face of the gutter) or vertically at the outside face of the gutter (if the roof seam is attached to the outside face of the gutter). In either case an end enclosure will cap the trimmed fascia panel rib. The integral gutter that is parallel with the existing standing seam roof ribs at the roof the GFRC wall panel intersection (west end) will have rigid insulation placed into the existing gutter and the new roof membrane will be carried over the existing gutter and terminated at the face of the GFRC wall panel. This treatment is being done because the caulk joint at the bottom of the GFRC panel (towards the bottom of the integral gutter) will become inaccessible after the reroofing raises the elevation of the roof. To solve this problem the roof will be taken over the existing gutter and the joint will no longer need to be treated in the future. Roof #2 The integral gutters that are parallel with the existing standing seams (east and west ends) will have the new roof stop at the inside edge of the integral gutter and the built-up sides of the new roof flashed into the existing integral gutter. The existing lighting protection system (LPS) elements (antenna and conductor) will not be impacted by the construction at the edge and can be left in place during construction. The integral gutters that are perpendicular with the existing standing seams and that terminate at an integral gutter on the inside face of a composite aluminum panel bullnose (north and south ends) will have the new roof stop at the integral gutter. The roof will be flashed into the integral gutter. Additionally since the existing gutter has insufficient capacity the gutter capacity will be increased by adding a continuous plate on the outside of the gutter that will raise the depth of the gutter to allow it to hold more volume of storm water. The addition of the plate and the flashing around the added plate will likely require removal and reattachment of the LPS elements that are attached within the existing gutter. Roof #3 The integral gutter that is parallel with the existing standing seam roof ribs on the inside face of a composite aluminum panel bullnose (west end) will have the new roof stop at the inside face of the integral gutter. The roof will be flashed into the integral gutter. The integral gutter that is parallel with the existing standing seam roof ribs at the roof the GFRC wall panel intersection (east end at the north and south sides of the Terrace) will have rigid insulation placed into the existing gutter and the new roof membrane will be carried over the existing gutter and terminated at the face of the GFRC wall panel. This treatment is being done because the caulk joint at the bottom of the GFRC panel (towards the bottom of the integral gutter) will become inaccessible after the reroofing raises the elevation of the roof. To solve this problem the roof will be taken over the existing gutter and the joint will no longer need to be treated in the future. The integral gutters that are perpendicular with the existing standing seam roof ribs that merge with ribbed fascia panels (north and south ends) will have the new roof stop at the inside face of the integral gutter. The roof will be flashed into the integral gutter. The current detailing of �false ribs � that span across the integral gutter will not be continued with the new detailing. The new standing seam fascia panels will however be extended above the existing gutter by approximately 2 � to prevent water overflowing the gutter given the raised elevation of the new roof relative to the existing gutter. The roof edges that terminate into fascia panels that do not have integral gutters and the existing fascia panels are to remain (where it interfaces with the fascia panels on the Fifth Floor Terrace) will be detailed to have the new roof terminate with flashing extending over the existing fascia panels. The ribs on the existing fascia panels will need to be trimmed horizontally at the top to allow the roof flashing termination. Removal and replacement of the Terrace guardrail will be required to perform the roof edge work at these locations. The roof edges that terminate into fascia panels that do not have integral gutters and the existing fascia panels are to be replaced (at the inside face of panels where the roof is gapped from the ATCT shaft) will be detailed to have the new roof terminate with flashing extending over the new fascia panels. The roof edges terminating along the ATCT will have substantial modifications. The original design had an integral gutter at this intersection that also was an expansion joint. Over time the gutter leaked and the fix to the leak placed a plate over the integral gutter from the roof the face of the ATCT �s GFRC panels. This fix compromises the free movement of the joint required for proper expansion joint behavior. The new detailing will remove the cover plate and then provide a roof curb along the edge of the existing roof. A new bellows expansion joint will be placed between the new roof curb and the ATCT GFRC wall. There will not be a gutter provided, instead stormwater will be directed over the roof curb to the adjacent roof surface for drainage down to the gutter on the north and south ends of Roof #3. B.RECLADDING DESIGN Cladding of the Fascia and Soffit Areas for Roof #3 The proposed cladding of the fascia and soffit areas associated with Roof #3 will require the removal of the existing metal fascia and soffit panels. The recommendation to remove the fascia and soffit panels is made for several reasons. The reasons are as follows: By removing the fascia and soffit panels to the metal deck substrate there is better exposure to the existing 1 5/16 � deep continuous metal backing system that will support the new fascia or soffit panels. If the new fascia and soffit panels were placed atop the existing standing seam fascia and soffit the gap between the existing standing seam panel and the back side of the new standing seam panel would need to be filled by the same materials (rigid insulation or �top hat �) used for the roof. This would increase the complexity of the cladding effort and may impact the ability to achieve a warranted finished product. If the new cladding left the existing fascia and soffit in place the increased thickness of these elements would create some detailing issues. For example, where the soffit interfaces with the head of the aluminum storefront system on the north and south façade of the western portion of the Administrative Base Building (see Photo #20 in Appendix 1) there would be a difficult transition with an �overlay � situation. The demolition of the existing fascia and soffit will damage the existing waterproofing membrane currently beneath it. The damaged existing membrane will be fully removed. The new cladding effort will require the application of a new membrane atop the existing metal deck substrate. Rather than use a sheathing board atop the metal deck substrate it is recommended that a heavier gage metal panel system be used. The heavier gage will be required to eliminate any potential oil-canning due the lack of a sheathing board back-up. In our opinion the sheathing board would be cumbersome to apply in a vertical or underside application and the added cost of a heavier gage metal will be offset by a reduction in installation cost due to the elimination of the sheathing element. Cladding Material Information The new fascia and soffit panels will use a standing seam metal system based on a Galvalume � panel. The Galvalume metal panel is selected over an ordinary galvanized product because of better outdoor corrosion resistance and longevity for the environmental factors associated with the project. Galvalume is a trademarked name, but it is used as a generic term to describe a metal panel �s product consisting of steel coil coated with a metal alloy. That alloy is 45% zinc and 55% aluminium. It looks similar to galvanized steel, but the visible crystals are smaller and close together, giving it a smoother appearance. Galvalume has an upgraded product identified as Galvalume Plus. The only difference is the plus version has a thin, clear acrylic coating. Because Galvalume Plus can be roll-formed dry without vanishing oil, it is very easy to form and install safely. The combination of zinc and aluminium in Galvalume for the fascia and soffit panels enhances both the positive and negative effects of aluminium. Galvalume has barrier corrosion resistance and heat resistance similar to aluminized material and good bare edge galvanic protection and forming qualities like galvanized material. Consequently, Galvalume and Galvalume Plus will resist rust and the elements while providing a sturdy and protective covering. Galvalume is more corrosion-resistant than galvanized steel, but because aluminium provides barrier protection instead of galvanic protection, scratches and cut edges are less protected. Galvalume is offered in both bare and pre-coated versions. Most Galvalume, like galvanized steel, is coated. But Galvalume has an excellent performance life in bare exposures as well. Both galvanized steel and Galvalume weigh 100 to 150 pounds per 100 square feet and contain about 35% recycled materials. The cost of Galvalume and Galvalume Plus are about the same as that of galvanized steel. The coating used on Galvalume is very important because it is critical to the length and conditions of the entire warranty of the panel product. Coated metal panels have progressed from a single coat straight polyester paint system in the early years to Poly vinyl idene fluoride (PVDF) acknowledged as the premium resin for coil coatings. It is a kind of fluoride, a family that includes such well known products as Teflon and Halar. PVDF resin has superior chalk resistance and gloss retention as well as stain and chemical resistance. It is softer than polyester, making it highly formable without risk of cracking. Current pretreatments and primers along with superior paint coating have increased product warranties dramatically. Galvalume should not be used on, in, or around concrete or mortar. Concrete and mortar are highly alkaline environments. Bare Galvalume and painted Galvalume sheets suffer rapid corrosion when in contact with mortar and concrete. Bare Galvanized and painted Galvanized perform better in this type of environment. Installation Information The new ribbed fascia and soffit panels will employ typical spacing that within the manufacture �s standard line. The rib spacing will be approximately 12 � on-center. The start of the spacing of the panel standing seam ribs will be from the east end of the fascia associated with Roof #3. The spacing of the soffit panel ribs will match the fascia panel ribs. Ribbed fascia panels will provided on the north and south facades. Ribbed soffit panels will be provided at all replaced soffits. Where the existing fascia panel is a flat panel, a new flat panel (as opposed to standing seam panel) will be provided to be able to mimic the top and bottom detailing of the flat panel where it interfaces with the flat section of the roof panel (membrane or standing seam metal option). Additionally on the inside face panels to the north of the ATCT shaft the current ribbed panel configuration will be replaced with a flat panel. It is felt that that the ribs on this face are hardly visible and on the south side the panels will be better detailed into the existing louver. C)OTHER DESIGN ASPECTS Proposed Solutions for Other Roofing Elements Other elements within the plane of the roof, or at the perimeter of the roof that will require consideration during the reroofing of the roofs includes the following: Tie-Off Anchors There are quite a few tie-off anchors on the roofs that are intended for fall protection for anyone that goes on the roof. The original design drawings referred to these anchors as �Safety tie-rack anchor by building maintenance system �. Given the vague nature of the note on the drawing and the inability to find any of the original submittal information (shop drawings or design cut-sheets) that may have provided more information regarding the capacity of the tie-off anchors, it is impossible to determine the exact make-up of the anchors and their ability to resist OSHA prescribed fall protection loads. As an initial task the Contractor shall test each of the anchors on the roof under construction with a testing mechanism that can test the tie-offs to the OSHA required load. If the tie-offs meet the loading requirement it will be allowable for the Contractor to use them during the construction of the new roof and no further modification will be required. If the tie-offs fail the load test remedial action will need to be undertaken to either strengthen the existing tie-off, or replace the tie-off with one that has adequate capacity. For the purposes of the bid documents it will be assumed that the tie-offs will meet the testing requirements and no remedial action will be necessary. The Contractor, however, will be required to include testing of all of the tie-off anchors in his bid. Water Drainage from Pipes in Integral Gutters The scope of work for this project specifically identified the drainage pipe at the northwest corner of Roof #2 as a concern for the site. During heavy rainfalls the water from this pipe pours directly onto the site �s north pedestrian gate. The proposed solution for this issue is to provide a screened deflector mounted below the bottom of the existing drain pipe. The deflector will be cone shaped with the narrow side of the cone attached to the existing pipe. At the bottom of the cone, at the larger end of the cone, a mesh will be provided that will break up any potential stream of water and cause the stream to become dispersed. With the great height that the water drops from any initial dispersion of the water will become magnified. The only concern with this solution is the potential for the screened bottom to become clogged. The increase in diameter at the bottom of the deflector from the top is intended to alleviate the potential for this problem. Although Roof #2 �s northeast corner was identified as being the most problematic condition, this modification will be provided for all drains from Roof #2 (four on north end and four on south end). The modification will not be provided on the two locations each on the north and south ends where the drains also contain conduit filled with conductors for the LPS. The modification to the drains will not be applied to any other roofs. Lightning Protection System (LPS) Per discussion with FAA during the pre-proposal phase, portions of the existing lightning protection on the roofs can be temporary disassembled in order to facilitate the re-roofing effort. Maintaining a continuous loop of the system is not a requirement during the construction efforts. In areas where the re-roofing impacts the existing routing or mounting of the equalization loop conductor or the air terminals, those LPS components shall be temporary removed and reinstalled upon completion of the re-roofing process. Contractor shall field verify to determine if the existing mounting hardware can be reused. Provide new UL rated hardware as required. All work related to the LPS shall be in compliance with FAA STD-019e and NFPA 780. Most of the LPS system (antenna and conductors) for Roof #2 are mounted in the integral gutter at the edge of the roof. From visual inspection during the initial site survey (from fairly far away) these elements will likely not be impacted by the new work. III.Contractors Qualifications: 1.Quality Assurance a)FiberTite Roofing Systems shall be installed only by a Gold or Platinum Level roofing contractor, authorized by Seaman Corporation to install FiberTite Roofing Systems prior to bid. Herein, the term Authorized FiberTite Roofing Contractor is synonymous with authorized, roofing contractor and/or contractor. b) Sarnafil Roofing system shall be installed by an Elite Level roofing contractor, authorized by Sika/Sarnafil to install Sarnafil Roofing Systems prior to bid. Herein, the term Authorized Sarnafil Roofing Contractor is synonymous with authorized, roofing contractor and/or contractor. The Contractor and their personnel shall provide proof of previous SMRP installations acceptable to the Architect and owner. c)Roofing contractor shall have minimum five years of experience installing the Simulated Metal Rib Profile on projects that are similar in scope, magnitude and complexity. d)Roofing contractor's key personnel, that are required to be on the roof during this installation, shall have received specialized training in the installation of the specified roofing system and SMRP by Seaman Corporation or Sika/Sarnafil. Key personnel is also required to have a minimum of 3 years of experience installing the SMRP system on projects of similar scope, magnitude and complexity. e)Prior to the start of work project specific training for the installing crew shall be provided on site by the roof system manufacturer. f)Roofing System by FiberTite or Sika/Sarnafil shall be installed in accordance with the project specifications, drawings, and most current guide specifications and details as amended and/or authorized by the manufacturer for specific project requirements. During the course of the project bi-weekly manufacturer employee technical representative site visits are required to confirm quality assurance. g)There shall be no deviations from approved contract specifications or shop drawings without prior written approval by the owner/owner representative and the roof manufacturer. Approved SMRP layouts indicated in approved shop drawings shall be chalked on the roof surface and confirmed for quality prior the installation of the SMRP on a daily basis. h)Unauthorized deviations may subject the roof system to warranty ineligibility and rejection of work by the owner/owner representative COR. i)Any and all work found to be substandard or in violation of the Contract Documents or Manufacturer's Specifications shall be subject to rejection including complete removal and replacement with new materials at the expense of the contractor. Removals and replacement will extend to assure the membrane and SMRP layout and finish appearance is not affected in any manner. j)Upon completion and certification by the contractor that a quality installation has been completed in accordance with the approved contract specifications and all field welds have been probed and inspected, a quality assurance inspection of the roof system shall be performed by the roof manufacturer for acceptance and approval. k)All field seams shall be visible and available to the roof manufacturer at the time of final inspection. All responses to this market survey are due by close of business (4:00 P.M. Pacific Time) January 2, 2014. The FAA prefers that all response submittals, including attachments, be submitted electronically to clarence.davis@faa.gov, or by fax to (425) 227-1055. Non-electronic submittals shoud be sent to: Federal Aviation Administration Attn: Clarence Davis AAQ-530 1601 Lind Avenue SW Renton, WA 98057-3356 PRELIMINARY SCHEDULE: Small Business Size Standard for NAICS Code 238160 Roofing Contractor is $14.0 Million. If you're viewing this announcement from a source other than Federal Aviation Administration Contract Opportunities (FAACO), visit https://faaco.faa.gov/index.cfm/announcement/view/15457 to view the original announcement.
 

Web Link

FBO.gov Permalink
(https://www.fbo.gov/spg/DOT/FAA/NMR/15457/listing.html)
 

Document(s)

Attachment
 

File Name: Business Declaration Form (doc) (https://faaco.faa.gov/index.cfm/attachment/download/35832)

Link: https://faaco.faa.gov/index.cfm/attachment/download/35832

 

Note: If links are broken, refer to Point of Contact above or contact the FBO Help Desk at 877-472-3779.
 

Record

SN03250432-W 20131214/131212234530-50c9839af14956e840c39fb9f4962d75 (fbodaily.com)
 

Source

FedBizOpps Link to This Notice
(may not be valid after Archive Date)

---

| FSG Index  |  This Issue's Index  |  Today's FBO Daily Index Page |