A structural system comprising: a composite elongate member having a side configured for attachment to a structure; a channel on the side extending along a length of the composite elongate member; and a number of composite structures configured for placement in the channel and configured to attach a portion of the side of the composite elongate member to the structure; wherein the number of composite structures is configured to increase a capacity of the composite elongate member to withstand forces that pull the composite elongate member away from the structure, wherein the number of composite structures comprises layers of composite material that have a first arrangement in which various percentages of the layers of composite material are arranged at different angles relative to an axis through the composite elongate member such that a second arrangement for the composite elongate member has substantially the same percentages arranged substantially the same as the first arrangement, and wherein the first arrangement comprises about 50 percent of layers arranged about zero degrees relative to the axis, about 40 percent of layers arranged about 45 degrees relative to the axis, and about 10 percent of layers arranged about 90 degrees relative to the axis. a composite elongate member having a side configured for attachment to a structure; a channel on the side extending along a length of the composite elongate member; and a number of composite structures configured for placement in the channel and configured to attach a portion of the side of the composite elongate member to the structure; wherein the number of composite structures is configured to increase a capacity of the composite elongate member to withstand forces that pull the composite elongate member away from the structure, wherein the number of composite structures comprises layers of composite material that have a first arrangement in which various percentages of the layers of composite material are arranged at different angles relative to an axis through the composite elongate member such that a second arrangement for the composite elongate member has substantially the same percentages arranged substantially the same as the first arrangement, and wherein the first arrangement comprises about 50 percent of layers arranged about zero degrees relative to the axis, about 40 percent of layers arranged about 45 degrees relative to the axis, and about 10 percent of layers arranged about 90 degrees relative to the axis. wherein the number of composite structures is configured to increase a capacity of the composite elongate member to withstand forces that pull the composite elongate member away from the structure, wherein the number of composite structures comprises layers of composite material that have a first arrangement in which various percentages of the layers of composite material are arranged at different angles relative to an axis through the composite elongate member such that a second arrangement for the composite elongate member has substantially the same percentages arranged substantially the same as the first arrangement, and wherein the first arrangement comprises about 50 percent of layers arranged about zero degrees relative to the axis, about 40 percent of layers arranged about 45 degrees relative to the axis, and about 10 percent of layers arranged about 90 degrees relative to the axis.