{"id":7918,"date":"2026-10-08T11:04:27","date_gmt":"2026-10-08T03:04:27","guid":{"rendered":"https:\/\/www.bomissteel.com\/product\/aluzinc-trapezoidal-roof-sheet-cal28-1x6m\/"},"modified":"2026-10-08T11:29:29","modified_gmt":"2026-10-08T03:29:29","slug":"aluzinc-trapezoidal-roof-sheet-cal28-1x6m","status":"publish","type":"product","link":"https:\/\/www.bomissteel.com\/ms\/product\/aluzinc-trapezoidal-roof-sheet-cal28-1x6m\/","title":{"rendered":"Trapezoidal Aluzinc Roof Sheet – Cal.28, 0.36 mm, 1.08 x 6 m"},"content":{"rendered":"

Introduction<\/h2>\n

This aluzinc trapezoidal roof sheet is the same product written two ways. Cal.28 is 0.36 mm, the sheet measures 1.08 m by 6 m, and we quote both figures so your purchase order matches what the crew measures on site.<\/p>\n

Ciri-ciri<\/h2>\n

The coating is 55% aluminium, 43.4% zinc and 1.6% silicon, hot dipped on a continuous line. Aluminium builds a barrier oxide, and the zinc looks after the cut edges. That is what keeps a roof alive along the laps and the fixing holes. In tropical sun and monsoon rain, that combination outlasts plain galvanized sheet by a wide margin. A weathered surface still reflects most of the heat, which is worth having under a low roof.<\/p>\n

Calibre is the other thing buyers ask about. Across Colombia and the Andean market, roof sheet is ordered by calibre rather than by millimetres, and Cal.28 is the gauge that covers most domestic and light commercial roofs. Publishing both numbers removes the guesswork: 0.36 mm is the mill figure, and Cal.28 is the one the site foreman checks.<\/p>\n

Spesifikasi<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Item<\/th>\nNilai<\/th>\n<\/tr>\n<\/thead>\n
Coating<\/td>\nAluzinc, 55% Al \/ 43.4% Zn \/ 1.6% Si<\/td>\n<\/tr>\n
Ketebalan<\/td>\n0.36 mm \u2014 Cal.28<\/strong><\/td>\n<\/tr>\n
Sheet width<\/td>\n1080 mm<\/td>\n<\/tr>\n
Panjang<\/td>\n6000 mm<\/td>\n<\/tr>\n
Profil<\/td>\nTrapezoidal<\/td>\n<\/tr>\n
AZ coating weight<\/td>\nAZ150 (AZ100 to AZ200 on request)<\/td>\n<\/tr>\n
Surface<\/td>\nBare, or prepainted<\/a> in RAL colours<\/td>\n<\/tr>\n
Spangle<\/td>\nRegular or minimised<\/td>\n<\/tr>\n
Standard<\/td>\nASTM A792 \/ EN 10346<\/td>\n<\/tr>\n
Certificates<\/td>\nMTC, ISO 9001<\/td>\n<\/tr>\n
Kuantiti Pesanan Minimum<\/td>\n16 metric tons per specification<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Permohonan<\/h2>\n

Aluzinc roof sheet<\/a> goes onto buildings where the roof has to outlive the paint budget, and a trapezoidal profile spans purlins without extra support underneath. A 1.08 m sheet is light enough for two people to lift into place, which holds the installation cost down on low-rise work.<\/p>\n