slab structures which are cast insitu the falsework is usually supported off the columns or piles. In special cases .. elastomeric or sliding pot bearings. In essence, it is a precast concrete tee section, with the body an open, hollow, box type.
Engineering issues include loading and offloading the crane, checking the . pretressing strands within the O-frame and portal frames. Biennial Marine . tips entering the water, however no salt water damage was observed to the boom tip