how to build a utility trailer

{"cid":"91189592","title":"40 FT 3 Axle Flat Deck Utility Trailer Steel Frame With Airbag Suspension","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/b3\/3c\/889e0df58d3d4c75722ad4a5813a-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"SUNSKY","Minimum Order Quantity":"2 Units","Delivery Time":"30 Working Days","Certification":"BV\/CCC\/CE\/DOT\/SGS","Place of Origin":"China","Payment Terms":"L\/C, T\/T","Supply Ability":"500 Units Per Month","Packaging Details":"2 Units Load Into 40\/45 FT Container","Materials":"Carbon Steel Q345B","Payload":"40 Tons","Dimension":"12410*2480*1540","Axles":"Fuwa Brand 13 Tons","Suspension":"Airbag suspension","Tires":"385\/65R22.5"}}

{"cid":"91181450","title":"Adjustable Speed Electric Transfer Trolley Motorized Trackless Utility Vehicles","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/a5\/70\/84ca797176b07c8442ae840507a6-200x200-1.jpg","attrs":{"Price":"USD 2000~7800 set","Brand Name":"electric battery powered trackless utility vehicles","Model Number":"electric battery powered trackless utility vehicles","Minimum Order Quantity":"1 set","Delivery Time":"20 work days after received balance payment","Certification":"CE ISO SGS","Place of Origin":"China(mainland)","Supply Ability":"100 sets month","Packaging Details":"trap and wooden case","Product Name":"electric battery powered trackless utility vehicles","Capacity":"1-300T","Table Size":"Customized","Height":"Customized","Running Speed":"0-50\/min(Adjustable)","after-sales Service Provided":"Engineers available to service machinery","Control Mode":"Pendant\/Remote\/PLC Control"}}