Purdinmaking

Purdinmaking refers to the traditional craft of creating purdins, which are secondary structural members used in roofing. These are typically horizontal pieces of timber, metal, or concrete that span between the main structural elements of a roof, such as rafters or trusses. The primary purpose of purlins is to support the roofing material itself, distributing the load to the main rafters and preventing sagging.

Historically, purdinmaking involved skilled carpentry, with wood being the predominant material. Craftsmen would select appropriate timber, cut it to precise dimensions, and shape it for optimal strength and fit. The design and placement of purlins are crucial for the overall integrity and longevity of a roof structure, influencing its ability to withstand wind, snow, and its own weight.

In modern construction, while timber purlins are still used, metal purlins, particularly those made of galvanized steel, have become increasingly common due to their durability, resistance to rot and insects, and ease of installation. Concrete purlins are also employed in specific applications. The process of purdinmaking today often involves factory production for metal and concrete components, with the on-site work focusing on accurate measurement, cutting, and fastening of these engineered elements. The skill involved has shifted from shaping raw timber to precise assembly and engineering calculations to ensure structural adequacy.