General description of the product
a) Expansion joints made of composite construction, utilizing metallic material (e.g. steel, stainless steel, or equivalent material wire braid) with rubberized/elastomeric coatings inside and/or outside or similar arrangements;
b) External fire-resistant sleeves may be accepted, if needed, to ensure fireresistant characteristics;
c) Full-metal bellow-type expansion joints are covered by a different set of Rules and therefore cannot be considered within this specific technical requirement.