A group of 20 stone anchors from the waters of Dwarka, on the Gujarat Coast, India

A large number of stone anchors were discovered in a water depth of 10–14 m off Dwarka during the 1998–99 season. The seabed near the anchors consists of a ledge with an average height of 1 in. Several anchors were found trapped between the rocks suggesting an anchorage. Twenty stone anchors of three types were loacted in a submerged channel on the southern side of the site. The grapnel type of anchor is associated with Indo-Arab trade between the 8th and 16th centuries AD. The triangular or composite anchors have a date ranging from 2500 BC to the Modern Period. Therefore, the dating of these anchors at Dwarka is a matter of concern and is discussed.     

Performance of Wall to Diaphragm Anchors for Use in Seismic Upgrade of Heritage Masonry Buildings

Performance of wall to diaphragm (WD) anchors in heritage unreinforced masonry (URM) buildings during the recent New Zealand earthquake series is commented on, detailing typical failure modes. Current building code provisions for the design of masonry anchors are discussed and overview of an associated experimental program investigating the effectiveness of a relatively new type of retrofit WD anchors is presented. A total of 40 anchors were tested for pull out capacity (POC), of which 30 were installed in salvaged heritage material assemblages and 10 were tested in-situ at a heritage URM building. The POC of anchors ranged from 13.01 kN to 23.12 kN when installed in a heritage URM wall and between 9.54 kN and 12.16 kN when driven from side into two consecutive floor joists of a heritage timber diaphragm. Investigated also were the effects of embedment length, installation quality, anchor location, condition of masonry, and condition of substrate materials on anchor performance.     

The maritime role of the island of Vectis in the British pre-Roman Iron Age

The distribution of Dressel 1 amphoras and Gallo-Roman ceramics in and around the Isle of Wight is examined. Some come from the floor and margins of the Solent seaway where trawling and natural coastal processes are at work. The authors suggest that islanders of the Iron Age were accomplished seafarers, active in cross-Channel trade. The creeks of the island provided natural havens for these activities while the eastern Solent seems to have offered a great sheltered anchorage in an important strategic position. This is equated with the Magnus Portus mentioned by the 2nd-century geographer Ptolemy. The authors consider that submerged artefact scatters and ancient anchorages are aspects of the European coastline which are in particular need of archaeological evaluation and protection.