Discussions on site with the Fletcher Construction project manager (David Kidd) confirmed that although the bridge design had allowed for support of a DN 450 steel main the actual pipe supports and the pipe itself were outside of the scope of the bridge project. Fletcher Construction subsequently requested that CRFG as the pipeline design build contractor supply pipe support bracket details.

【翻译】与弗莱彻建筑项目经理（ 大卫·凯德）在现场的论证确认，虽然大桥的设计考虑到了DN 450主钢的支撑，但实际的管道支架和管道本身不在桥梁项目的范围之内。弗莱彻建筑公司随后要求，作为管道设计施工承包商的CRFG，应提供管道支架的详情。

【结构分析】

第一句：Discussions on site with the Fletcher Construction project manager (David Kidd) （主语：与弗莱彻建筑项目经理（ 大卫·凯德）在现场的论证）confirmed （谓语：确认） that although the bridge design had allowed for support of a DN 450 steel main the actual pipe supports and the pipe itself were outside of the scope of the bridge project. （宾语从句：虽然大桥的设计考虑到了DN 450主钢的支撑，但实际的管道支架和管道本身不在桥梁项目的范围之内）

1. 主语部分分析：Discussions （主语中心词：论证）on site （介词短语作定语：在现场）with the Fletcher Construction project manager (David Kidd)（介词短语作定语：与弗莱彻建筑项目经理（ 大卫·凯德）的论证）

2. 宾语从句分析：

让步状语从句：although the bridge design had allowed for support of a DN 450 steel（虽然大桥的设计考虑到了DN 450主钢的支撑）

主句：the actual pipe supports and the pipe itself were outside of the scope of the bridge project.（实际的管道支架和管道本身不在桥梁项目的范围之内）

第二句：Fletcher Construction （主语：弗莱彻建筑公司）subsequently（时间状语：随后） requested （谓语：要求）that CRFG as the pipeline design build contractor supply pipe support bracket details.（宾语从句：作为管道设计施工承包商的CRFG，应提供管道支架的详情）