CRFQ DMT2700000001 Attachment A Spiking Pattern.pdf

This file is a technical specification attachment for a railroad tie spiking pattern document related to a West Virginia contract opportunity to replace 4,000 ties on the SBVR (Shenandoah Valley Railroad) with gage installed ties. The document establishes authorized spiking patterns for main tracks and side tracks based on specific criteria including track type, tangent alignment, curve degree, and train speed. For main tracks on tangents and curves less than 2 degrees with speeds up to 45 mph, the pattern is designated as "A" with 2 spikes per tie. Main track curves of 2 degrees to less than 6 degrees require pattern "B" (3 spikes per tie), while curves over 6 degrees use pattern "C" (4 spikes per tie). Side track spiking patterns vary based on speed classifications: tracks with speeds up to 25 mph use patterns "A" (2 spikes) for tangents and minor curves, "B" (3 spikes) for curves 6 degrees to less than 12 degrees, and "C" (4 spikes) for curves over 12 degrees. Side tracks operating at speeds greater than 25 mph require pattern "A" (2 spikes) for tangents and curves under 2 degrees, pattern "B" (3 spikes) for curves 2 to less than 4 degrees, and pattern "C" (4 spikes) for curves exceeding 4 degrees.

The document provides technical guidance to ensure proper tie installation throughout the railroad system, with spike placement varying based on track geometry and operational parameters. Main track is defined as any track other than an auxiliary track that extends through yards and between stations where trains operate under standard rules or special instructions. Siding refers to auxiliary tracks designated for train meeting and passing operations. This specification attachment ensures consistency and safety in tie installation work across the project scope of replacing 4,000 ties on the SBVR network.