A00001RFI Responses dated 9_28_26.pdf

RFQ 70Z03026CCLEV0117; USCG LORAIN EZ-SUPPLY FLOORING RENEWAL,

USCG STA LORAIN, 110 ALABAMA AVE, LORAIN, OH 44052.

A0001 RFI Responses

9/28/2026

Section 3.2.1 page 4 and Section 3.2.3 page 5.

QUESTIONS:

Please clarify the required reconstruction for the two depressed areas where the existing railroad tracks and ties are located. For pricing purposes, each depressed area is approximately 6 ft wide x 48 ft long x 12 in deep (approximately 576 SF total).

Please confirm whether the Contractor is required to reconstruct the entire two 6 ft x 48 ft depressed areas after rail/tie removal, including compacted aggregate backfill/base and new structural concrete placed to the required finished grade and drainage profile, or whether structural infill is required only at the actual rail trenches/localized areas.

If the full depressed areas are to be reconstructed, please confirm: (1) required concrete slab thickness; (2) concrete compressive strength/mix; (3) reinforcement and/or dowel requirements;

(4) required aggregate base thickness/material and compaction; and (5) whether the 12 in depression may be built up with compacted aggregate below the new concrete slab while maintaining the specified drainage slope/swales and forklift/pallet-jack load capacity.

ANSWERS:

The structural infill is only required at the actual rail trenches/localized area.

Rail Trench Infill: Rapid-setting, non-shrink structural hydraulic repair mortar or pre-packaged polymer-modified structural concrete mix achieving a minimum compressive strength of 5,000

PSI at 24 hours and > 6,500 PSI at 28 days. Screed / Swale Re-profiling: 3-component industrial epoxy/polymer screed mortar (e.g., SikaPronto, MasterFlow, or equivalent) with minimum compressive strength of 10,000 PSI to withstand narrow polyurethane wheel contact stresses.

Transverse Doweling: Along both vertical cut faces of the rail trenches, the contractor shall drill and epoxy-grout #4 Grade 60 rebar dowels (minimum 12" length, 6" embedment) spaced at 24 inches on center.

Longitudinal Reinforcement: Provide two continuous lines of #4 Grade 60 rebar placed longitudinally over chairs within the trench prior to placing structural infill.

Bonding Agent: Apply an ASTM C881 Type II, Grade 2 structural epoxy bonding agent wet-on-wet to all cut concrete faces immediately prior to mortar/concrete placement.

The entire rail void must be filled with solid, monolithic structural cementitious/polymer material tied directly into the adjacent slab using the dowels specified above.