Details：In order to meet the oversea markets, our company has developed double triangle manhole covers, which are mainly exported to Europe and Hong Kong, China and other regions. The specifications of the existing
double triangular manhole covers as follows：
| Item | Specification | Loading | Frame size | Clear opening size | Height | Materials |
| Double triangle manhole cover | 300*300*100 | E600 | 410*410*100 | 300*300 | 100 | QT500-7 |
| Double triangle manhole cover | 300*300*150 | E600 | 410*410*150 | 300*300 | 150 | QT500-7 |
| Double triangle manhole cover | 600*600*150 | E600 | 800*800*150 | 600*600 | 150 | QT500-7 |
| Double triangle manhole cover | 675*675*150 | E600 | 875*875*150 | 675*675 | 150 | QT500-7 |
Application：According to the bearing capacity of the product, double triangle manhole covers can be used in the following places: municipal roads, highways, communications, electricity, tap water, residential areas, schools and other parks.
Remark：The company has complete and advanced production equipment and production technology, and can customize products of any size according to customers’ samples or drawings.
