TABLE 7: CROSSTIES AND SWITCH TIES
Crossties and switch ties are sawn rectangular timbers that will be used
on or in the earth to support rails.
Treatment Standard: AWPA C6
Brands: The producer shall brand each tie at either end. Each brand
shall show as a minimum:
Company name or logo
Year of Treatment
Acceptable Species: Unless otherwise specified in the contract, all ties
shall be either White or Red Oaks or dense Southern Pine. Pine will be
considered to be dense if at least one end averages 6 rings per inch on a
radial line three inches long. Other species that may be used, if allowed
in the contract specification, are Ash, Beech, Coastal Douglas fir, Gum
(black and red), Hemlock (western), Hickory, Locust (Black and
Honey), Maple, dense Pine (Jack, Lodgepole, Ponderosa, Red), Walnut,
and mixed hardwoods.
Acceptable Preservatives: Creosote, Pentachlorophenol
Penetration and Retention Rates: These will vary according to species.
AWPA C6 states minimum standards for each.
Incising: Douglas-fir and all hardwood species will be incised prior to
Acceptable Quality Marks: None Available.
Note: The producer's brand will not include the species nor the preserv-
ative retention rate. These can be found in the inspection report that ac-
companied the shipment. You should verify that the information in the
report conforms with the specification and the AWPA standard. You
should also check for evidence of borings which should have been done
to determine penetration and possibly retention.