𝐏𝐄𝐁 𝐊𝐧𝐨𝐰𝐥𝐞𝐝𝐠𝐞 – 𝐏𝐚𝐫𝐭 𝟐: 𝐌𝐮𝐥𝐭𝐢-𝐒𝐩𝐚𝐧 𝐅𝐫𝐚𝐦𝐞𝐬

Multi-span frames are commonly used in 𝐥𝐚𝐫𝐠𝐞 𝐢𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐚𝐥 𝐚𝐧𝐝 𝐥𝐨𝐠𝐢𝐬𝐭𝐢𝐜𝐬 𝐛𝐮𝐢𝐥𝐝𝐢𝐧𝐠𝐬 where wide, uninterrupted space is required.
In PEB design, 𝐮𝐩 𝐭𝐨 𝟔 𝐬𝐩𝐚𝐧𝐬 𝐨𝐫 𝟏𝟐𝟎 𝐦𝐞𝐭𝐞𝐫𝐬 can be analyzed 𝐰𝐢𝐭𝐡𝐨𝐮𝐭 𝐥𝐚𝐭𝐞𝐫𝐚𝐥 𝐞𝐱𝐩𝐚𝐧𝐬𝐢𝐨𝐧 𝐣𝐨𝐢𝐧𝐭𝐬, allowing efficient structural behavior and flexible layouts. For wider buildings, 𝐝𝐨𝐮𝐛𝐥𝐞-𝐜𝐨𝐥𝐮𝐦𝐧 𝐞𝐱𝐩𝐚𝐧𝐬𝐢𝐨𝐧 𝐣𝐨𝐢𝐧𝐭𝐬 are introduced to manage structural and thermal movement.
Exterior columns are designed as 𝐛𝐮𝐢𝐥𝐭-𝐮𝐩 𝐬𝐞𝐜𝐭𝐢𝐨𝐧𝐬, tapered or straight, with 𝐩𝐢𝐧𝐧𝐞𝐝 𝐨𝐫 𝐟𝐢𝐱𝐞𝐝 𝐛𝐚𝐬𝐞𝐬 depending on eave height. These columns form rigid connections with continuous built-up rafters, while interior columns are typically 𝐩𝐢𝐧𝐧𝐞𝐝 𝐚𝐭 𝐛𝐨𝐭𝐡 𝐞𝐧𝐝𝐬 for optimized force distribution.
Roof drainage is integrated into the design through 𝐞𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐞𝐝 𝐯𝐚𝐥𝐥𝐞𝐲 𝐠𝐮𝐭𝐭𝐞𝐫𝐬, with internal downspouts assumed at bay spacing or upgraded solutions provided where internal drainage is not permitted.
Well-designed multi-span PEB systems deliver 𝐥𝐨𝐧𝐠 𝐬𝐩𝐚𝐧𝐬, 𝐦𝐚𝐭𝐞𝐫𝐢𝐚𝐥 𝐞𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐜𝐲, 𝐚𝐧𝐝 𝐫𝐞𝐥𝐢𝐚𝐛𝐥𝐞 𝐩𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 for modern industrial buildings.