How to choose between Class A and Class B1 for exhibition wall materials

How to choose between Class A and Class B1 for exhibition wall materials

Distinguish between Grade A and Grade B1 exhibition walls and cultural walls. For public spaces such as shopping malls, government service halls, and park showrooms, fire ratings are a critical selection factor. Per current building material combustion performance standards: Grade A materials are non-combustible, while Grade B1 materials are flame-retardant. Public areas typically require the base layer to be Grade A and the finish layer to be at least Grade B1.

先分清A级与B1级

展墙、文化墙做在商场、政务大厅、园区展厅这类公共空间,选材绕不开燃烧等级。按现行建筑材料燃烧性能分级,A级是不燃材料,B1级是难燃材料,公共部位通常要求基层到A级、饰面不低于B1级。具体指标以场所适用的规范条文和设计文件为准,分级叫法也以现行标准文本核对,别拿旧图纸上的老叫法对号。我们下单前先向甲方确认防火定位,再谈材料清单,顺序不能反。

常见材料怎么归位

基层这一层,石膏板、硅酸钙板配镀锌钢龙骨,属于不燃的稳妥选项;木方、OSB板即便刷了防火涂料,也只能算辅助手段,涂料厚度与遍数没有施工记录,验收时说不清楚。饰面这一层,铝塑板、亚克力、PVC发泡板各有等级区间,同名板材不同配方表现差别很大,不能拿品类名推定等级,要看这一批货的检测报告。

场所不同,松紧不同

商场中庭的展示墙、政务大厅的党建墙、学校走廊的文化墙,审查尺度逐级从严;仓库、后勤区这类辅助空间,按设计文件执行即可。拿不准的时候按高一级配置,成本差在板材上,返工差在工期上,两笔账一算就清楚。

报告要看三件事

一看检测机构与报告编号是否可查;二看报告上的样品名称、厚度、密度是不是进场这一款,同名不同厚度的报告对不上号是常见漏洞;三看结论落在A级还是B1级,别把难燃当不燃用。报告核对完,按批次留样,进场材料与留样对得上才算闭环。

构造细节决定成败

等级合格的板材,装法不对照样出问题。电气走线穿板时留足间距,灯箱类发热部件与饰面保持距离,线路接头放进可检修的盒里。展墙背后常有龙骨空腔,空腔封堵与分仓做法按图施工。重庆雨季长,板材进场垫高防潮,受潮的石膏板与木板强度下降,防火性能同样打折扣。隐蔽部位在封板前拍照留底,与施工记录一并归档。

验收资料归册

深化图标注各层材料与等级,现场按图收货,检测报告、材料清单、隐蔽工程记录归成一册交甲方。后期加挂展品、更换画面,翻册子确认承重与材料边界,不靠现场临时判断。

看图说话

配图一是设计中心入口的效果示意,大板基层配发光字,公共部位采用不燃基层加金属饰面的思路,实际落地以该项目的材料报审为准。配图二是办公室文化墙实拍,白墙基面上贴亚克力立体字与标语,饰面占比小,等级压力主要在基层与走线环节。



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Yu ICP Be 18012268 No. -2