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Like modern equipment, cranes only worked well if used properly, but were slow and liable for accidents.

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Because the insulae were so liable to catching fire, Augustus had to create a limit of 70ft (21 meters) for each one. This also led to the creation of fire brigades.

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Although the insulae were known to be made out of bad materials, fire brigades were formed to protect these homes from the threat of fire.

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Haterius, instead of doing all the work himself, hired sub-contractors to supply him with a helping hand and most importantly the needed supplies to build.

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Emperor Titus only served for 2 years from 79-81 A.D.

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Rome caught  fire again in A.D. 80.

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The crane has a quintuple pulley system on the hoisting cable, with stay ropes each with a triple pulley. (On the tomb of Haterius).

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Due to crappy materials used for building Insulae, it was common they catch fire and/or crush you in your sleep :)

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The great fire of Rome, which occurred in 64 AD, was rumored to have been started by the emperor Nero. There is no condemning evidence to prove this accusation. In fact, Nero was in Antium when the fire broke out, thirty-five miles away from Rome. The fire originated in a slum south of Palatine Hill. The fire spread north quickly, assisted by the flammable nature of the insulae (apartment buildings). The flames devastated three of Rome's fourteen districts and lasted three days.

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On site stone Mason's were responsible for the quarrying and acquisition of the necessary stone for the arch. Transportation was often achieved through the use of barges taking the stone from the quarry site down river to the distribution site where the necessary infrastructure was in place.

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In addition to poor men and slaves as manual labor, Haterius utilized a crane as means to lift weights with a few men that would otherwise had taken dozens or more. This crane was a combination of pulleys, so to withhold the weight, ropes were tied to the ground.

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The Roman architects were responsible for providing designs and technical advice.

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Concrete could also be sandwiched between two faces of more expensive material, such as good quality stone or brick ; these were then often covered with plaste or stucco and painted in bright colors.

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Concrete could also be sandwiched between two faces of more expensive material, such as good quality stone or brick ; these were then often covered with plaste or stucco and painted in bright colors.

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Molds* plural

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Timber mold were utilized to produce desired shapes with the concrete

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On the arch are several carvings which includes Titus and his booty from Jerusalem, as well as the procession with the captured prisoners.

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But given the opportunity of a large contract and a technical challenge, Roman builders made adventurous use of concrete, cranes, and arches; and Domitian, who was determined to add to the splendors of his capital city, kept architects and builders very busy throughout most of his reign,

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Timber frames support the stones of an arch. Once the central keystone is placed in, the arch can support itself and the wood is removed.

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Yasmin Alejo-V.
Timber frames support the stones of an arch. Once the central keystone is placed in, the arch can support itself and the wood is removed.

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The masons were responsible for the quarrying of the stone and its transport, often by barge up the Tiber River, to the building-site in the city before carving the elaborate decoration and preparing the blocks to be lifting

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insulae=apartment type dwellings made of brick and timber. They were not made as sturdy as other buildings

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In order to make arches like the one that commemorated Emperor Titus, timber frames were used to support the arch during construction. Once the keystone (a final stone set at the top/center of the arch) was in place, the arch could support itself and the timber could be removed.

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The inhabitants of Rome in the first century A.D. were housed in a vast number of dwellings, many of them apartment buildings which were built mucj more cheaply, mainly of rock and timber.

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The concrete used by the Romans was such high quality that the buildings and architecture they built with it is still intact today.
Ex: Pantheon, Flavian Amphitheater (Colosseum)

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In order to make good quality cement the Romans would mix lime mortar, fine sand, clay, and water. The cement just like today was used as a adhesive layer between bricks and stones.

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The Haterii family was obviously renowned for architectural prowess, being responsible for the Colosseum, Arch of Titus and multiple triumphal arches.

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In addition to slaves and poor free men who worked to build structures like the Arch of Titus, there were carpenters and stonemasons. Carpenters put up timber scaffolding to support the arches before the keystone was in place.

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There is a crane carved on the tomb of Haterius' family.

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The Romans were not the first people to make concrete.

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Cheap buildings were known to be rickety and to catch fire easily

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Concrete was used as a substitute for stone with the construction of arches and vaulted ceilings.

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Augustus' boast was an exaggerated statement :"urbem latericiam accepi , marmoream reliqui" , as commoner people's  homes were stuffed between the public places in Rome .

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Columns with statues on top were built in the 4th century A.D.

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The Romans found that concrete, when shaped into arches, was strong enough to span large spaces without any additional support from pillars, and that it could carry the weight of large superstructure.

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After several fires, only four districts remained intact. Flavian Emperors were in charge of repairing cities and the restoration of temples

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After several fires, only four districts remained intact. Flavian Emperors were in charge of repairing cities and the restoration of temples

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Domitian built various buildings like temples, stadiums, concert halls, Titus' Arch, and a palace on the Palatine just to enhance the influence and majesty of the emperor.

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People who did not live in concrete constructed buildings lived in apartment buildings (īnsulae) which were made of brick and timber

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The Romans mixed cement with rubble, broken bricks, and pieces of tile to make opus caementicium, also known as concrete.

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Only 4 of the city's 14 districts remained intact.

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Many modern hand tools have been almost unchanged from those used by Roman craftsman.
Mallets
chisels
crowbars
trowels
saws
planes