At most urban construction sites there is very limited space for storage of material, equipment, debris containers, and cylinders. Thus, creative means must be found for finding adequate storage areas for critical elements of the project. This may require the leasing of off-site storage areas, finding areas under stairs for temporary storage, or using off-hour areas such as loading docks for the temporary storage of debris containers.
Often construction materials will be stored off site given the congestion found in the urban environment, with limited on-site storage. With virtually no available space at the site itself or in the immediate vicinity to utilize for on-site storage, the use of off-site storage facilities to store materials within reasonable proximity to the site will be necessary until they are ready to be incorporated into the project. See Exhibit 6-25 for a typical off-site storage facility. The CM/GC will determine what, where, and when various construction materials will need to be stored off site. Materials such as structural steel, pre-purchased equipment, generators, boilers, chillers, cooling towers, curtain wall, windows, electrical equipment, and light fixtures are examples of materials that may require off-site storage. If material is stored off site, and is to be requisitioned and paid for, ensure that the material is stored in a bonded warehouse, with an insurance certificate covering the material being paid for but not yet delivered to the site. An alternative approach would be for the manufacturers of the equipment to store the construction materials in their own warehouses, if they have sufficient space. However, the manufacturers' warehouse storage facility may be a long distance from the construction site, and may take a while to arrange for a delivery.
Construction in the urban environment presents unique challenges for storage of materials at the construction site. Given the small size of the property, there is not much space surrounding the building on the site to allow for adequate storage. During the construction process, large quantities of construction materials will be delivered to the site for installation in the project. The CM/GC must make provisions for the interim storage of construction materials to ensure that they are available at the site when
Main gate Entrance
10' HGT, Perimeter-fence (TYP.)
Main gate Entrance
10' HGT, Perimeter-fence (TYP.)
needed. Any materials being stored should be placed at a location where they do not pose a hazard to the workers, do not impede access to the construction areas, allow for the installation of other materials into the project, and are secured. The CM/GC will identify storage areas for each trade for their respective materials either on the floors where the materials are to be installed or at a central location, usually near the subcontractors' shanties. As an example, if the elevator doors and frames are stored in the floor space where sheet metal ductwork and piping is to be installed, there will be a logistical conflict. If possible, delivering and storage of the construction materials to the floor where they are to be installed would be preferable as to avoid double handling of the materials.
Another challenge of construction in the urban environment is the storage of dumpsters at the construction site, given the limited amount of available space at the ground level. In the logistical planning of the project, the CM/GC will determine if a large dumpster can be accommodated on the site for the storage and removal of debris, or if mini trash containers, with a capacity of less than one cubic yard, will be utilized. Often mini trash containers are used given that they can be wheeled around the building to various floors to pick up debris, and then brought to the hoist or elevator loading dock area for a trash truck with a compactor to remove them. The CM/GC must coordinate the use of the hoist and elevators to allow delivery of materials and personnel and the removal of debris, without causing congestion at the loading dock area, and restricting the access and availability of the hoists and elevators. This often requires deliveries and removal of debris before or after hours.
Storage of Gas Cylinders and Other Hazardous Materials
During the construction process, cylinders of flammable gases will often be utilized for demolition, welding, and brazing. These cylinders of gas tend to be disbursed around the site to perform construction work in various areas as required. They need to be kept track of, and locked up in a safe location each evening at the completion of the work. The lock up is either a locked steel cage secured to the structure or a chain and lock with the cylinders secured to the structure, such as a column. The cylinders should be identified as to their contents, have caps placed over them to secure the tops and valve areas, and be in good condition. A cylinder of flammable gas has a tremendous amount of explosive power. If the gas were to escape and ignite, this could result in a significant amount of personnel and property damage. It is important for the CM/GC to check the local codes and with the fire department to ensure adequate and safe storage of all materials at the construction site. Upon completion of the use of the flammable gases, they should be removed from the site as soon as possible to avoid any unnecessary exposure.
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